History VideoGame / Diablo

* DarkIsEvil: All the Prime Evils and demons.

The original ''Diablo'', after being out of circulation for years, was re-released on GOG in 2019.

''Diablo'' is a series of works created by Creator/BlizzardEntertainment. It mainly comprises {{isometric|Projection}} ActionRPG HackAndSlash videogames, but eventually delved into other media as well.

* AngelicAbomination: "Normal" angels have shades of this - while they look mostly like stereotypical gold-clad WingedHumanoids, their wings are made of glowing CombatTentacles, and they are completely {{Faceless}} beneath hoods. Played much straighter with Malthael's Reapers who for the most part are bloated, ghastly, malformed monsters resembling undead or demons with hoods and halos slapped on.

[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/diablo.jpg]]
%%
->''"Stay a while and listen."''
-->-- '''Deckard Cain'''

''Diablo'' is an isometric ActionRPG HackAndSlash game series from Creator/BlizzardEntertainment.

The first entry in the series was released in January 1997 and is still considered to this day one of the most important titles featuring action in third-person, advanced graphics, engaging gameplay and a fittingly ominous soundtrack to top it all. Notorious for having [[PlayTheGameSkipTheStory an elaborate backstory which nobody follows]] concerning a [[HeavenVersusHell war between Heaven and Hell]], ''Diablo'' is a huge {{dungeon crawl|ing}} consisting of [[BuildingOfAdventure 16 floors of increasing difficulty]] under [[CreepyCathedral the old cathedral]] of Tristram, [[HubLevel the only town in the game]], where {{NPC}}s provide you with quests, healing, or equipment. The player has three characters to choose from: [[FighterMageThief Warrior, Rogue, or Sorcerer]]. The goal is to reach the FinalBoss, Diablo, at the very bottom of the dungeon and kill him.

As a sort of simple graphical {{roguelike}}, the pursuit of the [[RainbowPimpGear perfect randomly-generated equipment]] and [[StatGrinding character build]] is the main draw.

The non-canonical third-party {{expansion pack}} ''Hellfire'' added eight new levels and four new quests: namely, a quest to kill another Diablo-esque baddie in the crypt near the church, [[LighterAndSofter a quest from Lester the farmer, a cow quest, and a quest to retrieve a teddy bear.]] Three more characters were also added: Monk, Bard and Barbarian. But you have to edit a text file to unlock two of those quests and characters.

%%Please do not create A Franchise/{{Diablo}} page until there are pages with three different Namespaces/

The original game spawned a heap of {{Sequel}}s and ExpandedUniverse including:

* ''WesternAnimation/DiabloIIIWrath'' (2012) -- An animated ShortFilm made by Creator/{{Titmouse}}.

!!Tropes found in the entire series:

!!Tropes found in Diablo I:

[[foldercontrol]]

[[folder:A -- F]]
* AbilityRequiredToProceed: In ''Hellfire'' (an expansion pack to the original game), you cannot reach the insect hive until the farmer character knows you well enough to talk to you about his problems (be level 15+) and then he will give you the explosives you need to create an entrance to the hive.
* ActionGirl: The Rogue, who can be an archer, a mage or a melee fighter, depending on how you build her.
* TheAlcoholic: Farnham the Drunk, a comedic character who actually has a tragic side to him; he had to watch most of his friends get slaughtered during a raid in the dungeons. He lost his mind and fell to drink soon after being one of the only survivors of those who followed the treacherous Lazarus into the Cathedral.
* AllThereInTheManual: Background information for much of the series is not actually in the game, though you do get plenty of tidbits from [=NPCs=]. The ''Diablo'' manual contained most of the plot and backstories of all the races and units. This includes a very vivid description of a little boy being transformed into Diablo.
* AlmostDeadGuy: The dying villager at the entrance to the Church that begins the "Butcher" quest in ''Diablo''. Since he'll hang on forever as long as you don't speak to him, and you don't actually need to speak with him to deal with the Butcher, some players simply ignore him in order to save his life.
* AncientTomb: The cathedral holds many free-standing stone coffins, many of which contain skeletons that will attack you. And then there is an entire level called The Tomb of King Leoric, which is not particularly ancient, but is still crawling with skeletons.
* AndIMustScream:
** The ''Diablo'' Warrior. You ''know'' that somewhere during his voyage to the East, he realized that Diablo has more and more control over him, and that instead of seeking salvation, Diablo will make him free another Prime Evil.
** Inarius the angel. Mephisto tore the wings from his back, sliced open his eyelids, and sealed him in a prison of mirrors. He's got nothing to do for the rest of eternity except gaze upon the reflection of his ruined form.
* AndThenJohnWasAZombie: At the end of ''Diablo'', the hero defeats Diablo and jams its [[SealedEvilInACan soulstone]] in his/her own forehead to contain it. This results in [[spoiler:the hero becoming the new BigBad in ''Diablo 2''.]] This was later [[RetCon retconned]] in ''Diablo 2'' by saying that said hero was more or less [[MindRape mindraped]] into doing so; the sequel also makes it explicit that the Warrior was the character to defeat and contain Diablo, while the Rogue and the Sorcerer were [[spoiler:ultimately corrupted by Diablo's influence to become Blood Raven and The Summoner respectively.]]
* AnimateDead: Justified on the [[AllThereInTheManual website]]. Evidently skeletons are actually dirt and bone dust held together by magic, rather than actual skeletons.
* AntagonistTitle: It even provides the image for the trope page.
* AntiGrinding: Each floor had a finite number of enemies, limiting experience and item acquisition. Although it's obvious fast enough that you can still grind by starting a new game with the same character, resetting the entire dungeon bosses and all.
* AreaOfEffect: ''Diablo'' and ''Diablo II'' feature lots of spells and effects with a circular hit radius, like Nova and its counterparts of other elements (including Diablo's Fire Nova), the Sorceress's Static Field (drops every nearby enemy's HP by a direct percentage), the Necromancer's Corpse Explosion and curses, the Barbarian's Warcries (both the buffing and de-buffing ones), and the Paladin's auras.
* ArmorAndMagicDontMix: In a roundabout way. A character's ability to wear a piece of armor (aside from level and any specific class restrictions on an item) more often than not depends on how many stat points are in STR. The result is that the 'pure' mage class (the sorcerer) can't wear the heaviest armor because the player has likely put most of their stat points into INT (and hasn't bothered with much in the way of +STR enchantments). In other words, they can't wear the armor because they're squishy, and they're squishy because they train their minds more than their bodies. Additionally, the first game gives sorcerers the lowest STR cap of any class, further restricting what armors they can equip.
* TheArtfulDodger: Wirt, who deals in illicit goods and has perhaps the saddest backstory of the entire first game.
* ArtShift: It's very apparent what was a part of the original ''Diablo'', and what the expansion ''Hellfire'' adds into the game; while both use pre-rendered CGI graphics, Hellfire is distinctly different in its visual style that look a lot more like 3D models overall, not to mention the expansion's foray into more eldritch and alien horror compared to the original content's gothic hell design.
* AttackFailureChance: The original ''Diablo'', which was based on {{Roguelike}}s, based both melee and ranged hit chances on your Dexterity, and if it was low enough, you could forget about hitting anything with your sword or bow. Thankfully, the Dexterity issue was easy enough to fix with enough Level Ups, particularly since Dexterity also governed block chance and ranged damage.
* AwesomeButImpractical: ''Diablo'' has a LOT of spells that are cool but useless. Town Portal can be learned as a spell, but you're very likely to find a scroll anyway. Couple that with the fact you have to learn it multiple times to reduce the mana cost to reasonable levels (especially for the Warrior) and, well... Likewise, Healing is a lot less useful than just slugging back a potion, and the unique ability each class has will see use only on the far side of never.
* TheBadGuyWins: ''Diablo'' ends with [[spoiler:the BigBad successfully convincing the hero to make a HeroicSacrifice and become the [[SealedEvilInACan can to seal the evil in]]]], which in ''Diablo II'' proves to be [[spoiler:a SenselessSacrifice]].
* BeatingADeadPlayer: Enemies will hack away at your corpse until you restart.
* BecameTheirOwnAntithesis: King Leoric went from a righteous and noble king to a bloody-handed madman and eventual undead abomination by the time that Diablo and his EvilChancellor Lazarus got through with him.
* BigRedDevil: Guess who?
* BittersweetEnding: Tristram ends up a shadow of its former self, with most of its townsfolk either executed by King Leoric or slaughtered by the Butcher. But at least King Leoric has been laid to rest, [[EvilChancellor Lazarus]] is dead, and the power of Diablo is contained... for now. The PlayerCharacter implants the Diablo soulstone within themselves and immediately begins to struggle against Diablo's essence fighting them from the inside, deciding to head for a pilgrimage to the Far East for answers. The [[VideoGame/DiabloII next game]] shows that they ultimately couldn't resist Diablo after all.
* TheBlacksmith: Griswold repairs your weapons and armor and buys and sells them as well.
* BloodstainedGlassWindows: The first half of the game revolves around working your way down through a cathedral's basements and catacombs.
* BloodyBowelsOfHell: Hell consisted of what seems to be bony walls filled with blood. The Nest in ''Hellfire'' was even more organic, but less infernal.
* BoringReturnJourney: Not only the Town Portal spell, but all the action takes place underneath the same town. Every now and then you'll find a secret passage that takes you right back to the surface.
* BossBanter: Four bosses (the Butcher, the Warlord of Blood, the Archbishop, and Diablo himself) have set phrases that they say when you encounter them. King Leoric speaks to you when you enter his tomb.
--> ''"AH, FRESH MEAT."''
* BossInMookClothing: Interestingly, Diablo himself, the final boss of the game, is treated as a regular mook ('white' name instead of the expected 'gold') known simply as "The Dark Lord".
* BowAndSwordInAccord: Good for general strategy purposes, but the cumbersome nature of switching weapons makes it a poor 'quick switch' tactic. This is also popular for dealing with the early boss, The Butcher, who is a big jump in difficulty for that level, but is incapable of opening doors, even one next to fenced gaps in the walls.
** Warriors might want to hang onto a decent bow for certain situations, some ranged enemies constantly run away and whittle you down, and few monsters can open doors, so you can usually snipe them through the 'windows' and take no damage in return.
** Rogues are masters of the bow, but there are times a Sword+Shield can be handy as well.
* BreakablePowerUp: In multiplayer, upon death all of a character's equipped items are dropped on the ground where they died, usually making retrieval quite difficult. A set of back-up gear (or a handy friend) are highly recommended.
* BreakableWeapons: Using the repair skill at lower levels fixes the weapon, but lowers its maximum durability number, meaning it needs fixing again sooner. Also, items reduced to zero Durability are destroyed, making low durability items like the Thinking Cap very tedious to use. However, there are shrines in the game that raise maximum durability, and making use of the Thinking Cap item (which has 1 durability) to start with almost requires exploiting these shrines.
* BreakoutVillain: Old game it may be, there are some bosses that becomes really memorable that they may end up getting re-used for future titles.
** The Butcher is just the first boss of the game, but he's become nearly as iconic as Diablo himself as far as villains go, thanks to being the first really difficult enemy to contend with (and his "Aaah, Fresh Meat!" sound byte considered really terrifying for its age), so much that he returns in ''VideoGame/DiabloIII'' with new designs and tricks, and then confirmed for ''VideoGame/HeroesOfTheStorm''.
** Likewise, next in line of those bosses is King Leoric the Skeleton King. He also returns in ''III'' and he's next to enter ''VideoGame/HeroesOfTheStorm'' after the Butcher. He's also popular enough by fandom to get included in ''VideoGame/DefenseOfTheAncients'' and Blizzard cared enough for his image, leading to the lawsuit against Valve and the latter ends up having to change their Skeleton King into [[VideoGame/{{Dota 2}} Wraith King.]]
* BrokeYourArmPunchingOutCthulhu: The hero winds up with a case of TheVirus, since the only way he could come up with to utterly stop the Lord of Evil was to shove a chunk of it into his face.
* TheButcher: A powerful boss demon which you can be confronted with.
-->"Aaaah, Fresh Meat!"
* TheCaligula: King Leoric of Khanduras was once a just and noble king, but was driven mad by Diablo's attempt to take him over. When his EvilChancellor, Archbishop Lazarus, kidnapped his youngest son Albrecht to be made a vessel for Diablo, Leoric lost it completely and fell into this trope's territory, having many people tortured and executed, up to and including his own queen, out of paranoia, an event that would come to be known in Tristram as "the Darkening." Leoric was slain by the captain of his army, Lachdanan, who could no longer bear to see his people suffer under his liege's madness. Unfortunately for Lachdanan, his knights, and Tristram, [[TheUndead the story did not end there]].
* CannibalLarder: The Butcher's room is covered in blood and features corpses hanging from hooks on the walls.
* ChainLightning: The spell called "Chain Lightning" isn't actually chain lightning. Instead, it shoots piercing lightning bolts at all enemies within range. It can do quite massive damage against tightly packed enemies, but is also prone to making 'gaps' if too many enemies are in range.
* ChaosArchitecture: The labyrinthine catacombs to Hell with their dead ends and lava caves under the cathedral in Tristram weren't built that way. They were perfectly normal catacombs that just happened to imprison a Prime Evil, who took over.
* ChewingTheScenery: The voice actress Lani Minella is no stranger to huge portions of LargeHam. Listen to her voice acting as Adria.
--> '''Adria:''' The Butcher '''IS A SADISTIC CREATURE'''...
* ChoiceOfTwoWeapons: It's a fairly good idea to have this set up. Warriors occasionally find themselves needing to shoot at something (or, in the case of enemies trapped on the opposite sides of portcullises, want to pick enemies off at a distance.) A rogue often finds herself needing to resort to hand-to-hand if fast enemies are encroaching, so having a sword and shield and the strength to use both available helps. Straying out of BowAndSwordInAccord and into MagicKnight, magic is helpful to the rogue as well, though the warrior's maximum magic is low that it's rarely worth his while. The sorcerer is pretty damn awful with the bow, and does poorly attacking with a sword, but sword+shield on a sorcerer is usually preferred for the extra set of enchantments on the equipment.
* TheChosenMany: In all the games, all of the classes are canonically involved in the quest, regardless of which one the player chooses, though the player never meets the others in a single-player campaign.
* {{Chupacabra}}: A Scavenger-type boss monster named El Chupacabras.
* ClassAndLevelSystem: You select one of several different character classes, but how you develop the character is up to you. Leveling up gives you five stat points you can add to your strength, dexterity, vitality or magic however you see fit.
** To a point, every class has the same stat-maximums.
* ColorCodedItemTiers: The first game's division between standard (white) items, enchanted (blue) ones and uniques (yellow), may be considered an UrExample. The sequels add the green "set" category, where items from the same set are more powerful when used together, and gold or orange tier for uniques, while yellow items become a more powerful tier of "randomly enhanced" blue items.
* ComicallyMissingThePoint: If you ask Farnham TheAlcoholic about the tainted water supply during the associated quest, all you'll get is a scoff and "You drink ''water''?"
* CompilationRerelease: The ''Diablo Battle Chest'', which includes both the first two ''Diablo'' games and the second game's expansion pack ''Lord of Destruction''.
* ConceptArtGallery: The game manuals themselves for the two first games had pages of concept art and background stuck in between everything else.
* ContinuingIsPainful: Dying (in multiplayer) results in you dropping all your items on the ground until you can get them back, provided someone else doesn't gank them in the meantime. Getting to your stuff can be a headache in itself, especially if you died to something really tough or a swarm of them.
* CrapsaccharineWorld: The main thread is a straight-up CrapsackWorld, but the tie-in novels show what it's like when it's ''not'' assaulted by DemonicInvaders. It's not actually any better, but it's better at hiding how screwed up it is.
* CrapsackWorld: The world of Sanctuary. Well, technically the tie-in novels make it a CrapsaccharineWorld, but the games themselves focus on what happens when the veil's stripped away, followed three seconds later by the flesh off your skull. The game ''starts'' with the noble king of Khandruas going insane and being corrupted and his kingdom being destroyed. Then you have to kill the undead king, plus demons are killing people, the prince has been kidnapped and possessed. After 16 annoying levels you finally make it to the BigBad, the title archdemon and beat him... except the prince is now dead and you just became Diablo's new, more powerful host.
* CrossPlayer: There's a specifically-sexed sprite for each character: male (Warrior, Sorcerer), female (Rogue)
* CutAndPasteEnvironments: The series prides itself for its randomly generated dungeons, and apart from a few carefully-constructed areas (boss levels, the last parts of final dungeons, towns etc.) it manages to avoid this trope completely.
* {{Cutscene}}: The games are renowned for having, at the time of their release, very well-done pre-rendered animation.
* CycleOfHurting:
** Getting hit with enough damage will stun you (or an enemy) and you can get stunned ''repeatedly'' which leads to a stunlock. Avoiding stunlock is pretty much the basis of all warrior's strategies, and is important to ALL chars. If you do get stunlocked, all you can do is mash healing potions hoping for a chain of misses. Meanwhile, your equipment was taking damage along with you, could break completely in just a few seconds once the durability alarm appears, and once broken would vanish forever. But then this is the game where clicking the wrong shrine takes away mana permanently and some monsters cause permanent life damage, so it's fair.
** On the bright side, this makes even the boss fight against Diablo a cinch. To elaborate: monsters can get stunned by spells they are not resistant to, usually dooming them because the cast speed of any character that wants to cast spells exceeds the hit recovery speed of the monster, but past the midgame just about everything is indeed resistant (or immune) to everything. Well, except Diablo himself, who for some reason is the only non-undead in the whole game that can be hit by the lowly Holy Bolt spell. And Holy Bolt deals pure damage that cannot be resisted...
* DarkerAndEdgier: The first game is this compared to the sequels. Granted, the plot of all the games is fairly bleak [[spoiler: (although the third installment is more cheerful overall, particularly in the ending)]] and Sanctuary remains a CrapsackWorld, but:
** The limited scale of the first game, taking place only in one dark, subterranean location, without the sweeping fields/deserts/whatnot of the sequels, makes it feel more personal.
** A sense of isolation is particularly present in the single-player -- there are no NPC companions, in contrast to the sequels, and the number of friendly NPC in the entire game in general can be counted on one hand. Once your character descends to the dungeon, it's you alone against the [[TheLegionsOfHell demonic horde]] [[ThingsThatGoBumpInTheNight in the darkness]]...
** The early game in ''Diablo'' is [[EarlyGameHell considerably more punishing]] than in both sequels, making your character -- at early levels -- look less like the archetypical world-saving hero and more like the average guy (well, [[BadassNormal average adventurer]], at least...).
** Even ''further'' enhanced by the more "realistic", dark art style of the game, which would not look out of place in a game like ''VideoGame/{{Darklands}}'', had the latter been made a few years later -- in contrast to the varied and colorful locations of D2, much less the even more colorful, slightly cartoonish signature art of ''[=WoW=]''-era Blizzard found in D3, though D4 would return to a more grounded and gritty presentation.
** All of this combined, plus the near-total lack of the trademark (again, [=WoW=]-era Blizzard) humor of the company, makes it the grimmest installment in a series that is [[{{DarkFantasy}} sufficiently dark as such.]]
* DarkFantasy: Quite.
* {{Deconstruction}}: The series as a whole is one to HeroicFantasy. No matter how hard you fight, no matter how many hellspawn you slay, the Great Evils will always be one step ahead of you, your actions will, more often than not, ''help'' them with their goals, and [[spoiler:they will ''always'' succeed in their plans and get what they want, even in death. ''Always''.]]
* DeathOfAChild: The story states that Diablo possessed a young prince's body. When Diablo is finally defeated in the end of the first game, his body turns back into that of the dead prince.
* DefensiveFeintTrap: "Pulling".
* DegradedBoss:
** The Butcher is an Overlord demon and a challenging boss early on, but later you can dispatch countless Overlords who are even stronger, albeit without the cleaver.
** Zhar the Mad appears halfway through the game as a boss. Dark mage type enemies resembling him are later found in the final Hell levels.
* DemBones: Skeletons are a common foe in the early levels
* DemonicPossession: ''Diablo'': [[spoiler: [[BigBad Diablo]] has possessed Prince Albrecht, the [[TheHero Warrior's]] little brother. And the ending? The player character gets possessed after he got tricked into inserting the dark Soul Stone unto his forehead]].
* DemonLordsAndArchdevils: The Seven Great Evils: The Prime Evils Diablo, Mephisto, and Baal, and the Lesser Evils Andariel, Duriel, Belial, and Asmodan. Diablo is the only one you face in the first game; the rest come into play in the sequels.
* DemonSlaying: You will be doing this a ''lot'' in this series.
* DevilButNoGod: Averted. There isn't a devil either. In Hell you have the Three Prime Evils and their four lieutenants, and in Heaven you have the Angelic Council. Sanctuary itself was created by a ''relationship'' between an angel and demon. But there '''used''' to be both.
* DiabolusExMachina: The game ends with [[spoiler:you killing Diablo and ramming his soulstone into your own head so you can contain him with your mind. It did not work so well.]] In fact, Diablo possessed the hero and used his power to strengthen himself so he could escape the dungeon and revive the other Prime Evils.
* DidYouJustPunchOutCthulhu: The whole point of the games, although how said punching out actually ends up turning out sets up the stories of the sequels.
* DoesntTrustThoseGuys: Among drunkard Farnham's words of wisdom: "I've never seen [Adria the witch] eat or drink, and you can't trust somebody who doesn't drink at least a little." [[VideoGame/DiabloIII Well...]]
* DoNotRunWithAGun: ''Diablo'' is a case with both player and monsters suffering from this.
* DoomedHomeTown: Tristram. [[spoiler:Especially in light of later games. It's bad enough that the trio of heroes that fought against Diablo wind up succumbing to a FaceHeelTurn, but for even more tragic points, with the exception of Deckard Cain, Gillian, and Adria, ''nobody'' in Tristram survives. Of those three, two meet their ends in ''[[Videogame/DiabloIII Diablo III]]'' ([[AssholeVictim even if one of them very much deserved it!]]) and the third, according to supplemental materials, got a case of SanitySlippage.]]
* DoomedProtagonist: The ending strongly implies this of the hero, who has rammed the soulstone into his or her own head to attempt to contain Diablo's evil. ''Diablo II'' makes very clear how bad an idea this was.
* DoorOfDoom: ''Diablo'' has this in spades. Lets you go to hell with horrors at the other end.
* DoorToBefore: There's a staircase/hole/bigger hole to each of the main areas.
* TheDreaded: Diablo, the antagonist of the series. Appropriate, given that he's the Lord of Terror.
* DropInDropOutMultiplayer: ''Diablo'' is almost MMORPG-like, with players able to join and leave at will, form into (informal) parties.
* DualWielding: The Bard had a crude form of it; they reused the Rogue animations so she's only ever shown holding one sword, but gets double damage and the ability to hit multiple enemies simultaneously when equipped with two.
* DudeWheresMyReward: In the ending, after the hero has fought through hundreds of monsters and finally defeated the Big Bad, what does he get? He shoves Diablo's Soulstone into his own forehead, which causes him to ''become'' Diablo in the second game. Justified in that it is a CrapsackWorld where NoGoodDeedGoesUnpunished.
* DungeonBasedEconomy: Played with and ultimately inverted. An otherwise normal village was made capital of its country because its local church housed one of the lords of Hell in a secret catacomb. The Prime Evil gradually corrupted the king, who bent the kingdom to ruin, but for a while, the town did well by selling to adventurers venturing into the church to fight demons. by the sequels, however, the demons had overrun the town and killed everyone.
* DungeonBypass: As a game with randomly generated dungeons, it will occasionally end up generating a floor's exit right next to its entrance. You can't bypass the entire dungeon this way, but you pretty much end up bypassing that floor.
* DungeonCrawling: The series, which began life as a {{Roguelike}} which had you killing demons and undead in a sixteen-level dungeon and ultimately became the HackAndSlash series we know and love today.
* DurableDeathtrap: ''Diablo'' doesn't have many traps of the classic variety, but a common baffling feature of dungeons is skeletons inside barrels. Who put the skeleton in there? Why hasn't the skeleton broken out? If the skeleton put himself in there so he could ambush you, why does he always wait to show himself until you've broken open the barrel and the skeleton is directly in the path of your weapon?
** The manual states they were people who were sealed in barrels to die. As for why they hadn't broken out and wait until you destroy the barrels...
* DyingAsYourself: [[spoiler: Poor Albrecht...]]
* DyingCurse: Lachdanan and his knights are cursed to eternal damnation by King Leoric, whom they were forced to slay to put an end to his madness.
-->'''King Leoric:''' Traitors! Even in death, the armies of Khanduras will still obey their king! Even if you will not...
* DyingTown: Tristram is slowly but surely decaying away as Diablo's influence spreads.
* EarlyBirdBoss: The Butcher. Early level players ''will'' get, well, butchered the first time they fight the dude, although fortunately you don't actually have to kill him the first moment you see [[BossRoom his lair]] and you can wait until you're [[LevelGrinding some levels higher]], because you'd need a pretty high Dexterity level to be able to trade blows with him in melee. He can even be [[HopelessBossFight literally impossible]] for some characters when they first meet him, as he regenerates health too fast to kill.
* EarlyGameHell: The hardest boss is the Butcher, encountered at level 2 and quite capable of surviving all your mana potions and staff charges and killing you in two hits.
* EarlyInstallmentWeirdness: ''Diablo'' was markedly different from its sequels. Aside from the expected differences in scope, lore, balance and gameplay features, the first game was much more survival oriented and featured several instances of ''VideoGame/NetHack''-style permanent character damage. Shrine effects were irreversible and not all were positive, and there was a monster that would permanently reduce your maximum life. When you died in multiplayer mode, all your gear would end up ''on the ground'' and would be lost forever if you were unable to recover it. This would be unthinkable in the sequels which revolve around MinMaxing character builds and ItemFarming.
* EasyLevelsHardBosses: Boss fights in the series are often a lot more difficult than the areas before or after them. The Butcher set the trend.
* ElaborateEqualsEffective: Used with the armors.
* ElementalCrafting: ''Diablo'' has this in a slightly unusual form; they have a rather standard set of metals and gems, but mechanically they're treated like any other magical item power, so an "Iron Short Sword" or "Bronze Dagger" is considered a magic item by the game. In the original ''Diablo'', the useful metals are Bronze < Iron < Steel < Silver < Gold < Platinum < Mithril < [[ThunderboltIron Meteoric]]; the negative ones are Tin and Brass. Gems provide elemental resistances; Topaz < Amber < Jade < Obsidian < Emerald give across-the-board resistance to everything. The specific resistances are ''colors'' (Red and Crimson for fire, White for magic, Blue for lightning, etc.) at the lower levels, but become gems when more powerful; Pearl < Ivory < Crystal < Diamond for resistance to general 'magic', Garnet < Ruby for [[PlayingWithFire fire]], Lapis < Cobalt (OK, it's a metal, not a gem) < Sapphire for [[ShockAndAwe lightning]].
* ElementalPowers: There are three types of magic damage/resistances: Fire, Lightning, and Magic. Four types if you want to count Holy Bolt and Apocalypse (neither can be resisted).
* ElementalWeapon: A staple of the games. In ''Diablo'', they can come with elemental powers.
* EliteMook: Quite literally. Elite mooks basically have a different colored name, more hit points, maybe a new power, and drop better loot. Otherwise, they're mostly the same as a normal monster. They also tend to be surrounded by a cadre of their type, which get extra HP and possibly share the unique ability/AI of the boss.
* EmpireWithADarkSecret: The tie-in novel "The Kingdom of Shadow" centers around this, coupled with CrapsaccharineWorld.
* EnemyCivilWar: Two lesser demon lords made a pact to overthrow the three greatest ones in one civil war, and afterward they started another civil war between them.
* EscapeRope:
** The Town Portal spell, which takes you to a specific spot in Tristram (sensible as it's the only town) and is a fairly low level spell that has the same effect no matter what your stats are, so even non magic-focused character builds could learn it. Scrolls would also drop fairly regularly.
** ''Hellfire'' added the Warp spell, which teleported you towards the nearest stairs. At best, it was a free escape from whatever battle you were in, at least unless the game was killing you [[StunLock the way it usually did]] or a free ride across half of the map. At worst, you were back where you started and had to walk across half of the map again.
* EthnicMagician: A black sorcerer and two white warrior types as player characters.
* EveryoneHasASpecialMove: The [[FighterMageThief three player characters]] in the original game had unique special abilities (item repair for Warrior, trap disarm for Rogue, and staff recharge for Sorcerer), while basically sharing the pool of abilities they could theoretically learn.
* EvilChancellor: Archbishop Lazarus was this to King Leoric of Khanduras. He was corrupted by Diablo long ago, and not only influenced him for the worse when the archdemon in question tried to take him over, but was responsible for many of the knights of Khanduras being killed in a war with Westmarch, the luring of many adventurers into the Tristram Cathedral to be murdered by the demonic Butcher, and the kidnapping of Prince Albrecht, Leoric's youngest son, to be a vessel for Diablo.
* EvilSmellsBad: Upon entering the catacombs, the main character comments, "The smell of death surrounds me."
* EvilSoundsDeep: No matter what game he's in, Diablo rocks the evil demonic voice.
* ExpandedUniverse: A number of novels penned in the world of Sanctuary, including the WordOfGod canonized Sin War Trilogy starring the Sanctuary equivalent of Heracles/Jesus set thousands and thousands of years before the games take place.
* ExpansionPack: ''Hellfire'' was an official expansion, but it was made by a third party.
%%* ExplodingBarrels
* EyeMotifs: The seal of the Horadrim order includes what could be a pair of very stylised eyes, dripping, within a triangle.
* EyeballPluckingBirds: In the intro, you see a close up of a crow picking out the eye of a decaying body. While not looking too realistic by today's CGI standards, that was a pretty unpleasant scene at the time of release.
* FallenAngel: [[spoiler: Izual, Inarius, Imperius, and probably others.]] The apparent lack of any {{Ascended Demon}}s bodes ill for the fate of the setting.
* {{Fanservice}}: Unlike her basic in-game sprite in which she has leather body armor, in the manual the Rogue is wearing a belly-baring bustier whose cut makes it clear that [[VaporWear it's all she's wearing up there]] and a loincloth that only just reveals that she's wearing something under it.
* FantasticRacism: The Angel Imperius displays this in the ExpandedUniverse. Even Tyrael shared his prejudice before Uldyssian's HeroicSacrifice showed him that humanity was capable of nobility and virtue.
* FantasyWorldMap: Sanctuary's a [[ChaosArchitecture constantly changing place]], though, since none of the maps looked [[RetCon like the other]]. The map, which is supposed to be of the same continent over a span of about thirty years, changes rather drastically from one game to the next.
* FaunsAndSatyrs: Goatmen, which are actually demons and not related to either goats or humans (or, at least, they weren't originally; ''Diablo III'' {{retcon}}ned it).
* FemaleAngelMaleDemon: ''Diablo'' has a picture of a male demon and a female angel for the health and mana orbs respectively. This doesn't apply to the lore though, as both Angels and Demons are shown have both male and female, with mostly male characters being portrayed for both. The backstory, on the other hand, inverts it with StarCrossedLovers Inarius and Lilith, with the former being a male angel and the latter being a female demon.
** Zigzagged with Imperius and Diablo. Both prefer male forms throughout the series, but Diablo [[spoiler: possesses the female Leah]], and later takes on some female features, such as slimmer waist and wider hips and chest.
* FighterMageThief: Played completely straight, with the Warrior, Sorcerer, and Rogue, respectively.
* {{Fireballs}}: It has fire magic in it after all so that's almost compulsory.
* FirstTown: Tristram, was in fact the only town in the game.
* FlavorText: The games are full of FlavorText.
* FlingALightIntoTheFuture: Evilly subverted. Azmodan pulls this with himself and his forces, sealing himself away until the heroes who defeated his fellow Prime Evils would be unable to stop him.
* FollowTheLeader: The series created its own genre called "''Diablo'' clones" (''VideoGame/{{Torchlight}}'', ''VideoGame/DungeonSiege'', ''VideoGame/UntoldLegends'', etc.), and was itself a graphical spin on another fine tradition in Follow The Leader: {{Roguelike}} games, of which ''VideoGame/NetHack'' is the most popular.
* ForeignLanguageTitle: "Diablo" is Spanish for "devil".
* ForeverWar: The ongoing [[HeavenVersusHell war between Heaven and Hell]], which is even called the Eternal Conflict. The period where angels and demons fought in the mortal realm of Sanctuary was called the Sin War, and it only ended when Uldyssian, a nephalem (one of the offspring of renegade angels and demons who were the ancestors of humanity), sacrificed himself for the sake of humanity.
* FriendInTheBlackMarket: That little snotrag Wirt.
* FriendOrFoe: Friendly fire is enabled.
* FromBadToWorse: Diablo driving King Leoric of Khanduras insane, bringing him back as a powerful skeletal demon, and then possessing his youngest son Albrecht. He then {{Mind Control}}s the hero of the first game, who it turns out is [[spoiler:the King's older son Aidan]], into sticking the piece of Diablo's soulstone into his own head.
[[/folder]]

[[folder:G -- L]]
* GiantMook: The horned demons appearing halfway through the game, and megademons on the later levels that are quite deadly and come in large numbers.
* GratuitousLatin: The bestiary in the manual gives the Latin names of all the enemies.
* GridInventory: ''Diablo'' virtually named this trope.
* GodIsDead: It doesn't come up much, but Anu and Tathamet -- local stand ins for [[God]] and the Devil respectively -- battled eons ago until they achieved a mutual kill. Anu's corpses became the High Heavens and Tathamet's became the Burning Hells, which gave rise to the angels and demons respectively. Though neither had a hand in creating Sanctuary or humanity except indirectly. They were initially one being until Anu decided to purify himself of all evil, creating Tathamet.
* GuysSmashGirlsShoot: The first game has a similar arrangement, with a female Rogue who functions best as an archer, and a male warrior. The male sorcerer mostly just fireballs things though.
* HealingSpring: Blood fountains and purifying springs, which provide an endless supply of health or mana at a rate of '''ONE POINT PER CLICK'''. Keep in mind a high level character will have hundreds of points in either stat.
* HeartDrive: The Soulstones have a nasty tendency to get used as these by the demons corrupting them, complete with taking over new hosts.
* HeavenVersusHell: The entire conflict of the story is a battle between the High Heavens led by the [[CouncilOfAngels Angiris Council]] and the Burning Hells led by the [[DemonLordsAndArchdevils Seven Great Evils]].
* {{Hell}}: The games use Hell and an attempt to stop a [[TheLegionsOfHell demonic invasion]] in their stories. ''Diablo'' features the catacombs of Tristram's cathedral eventually warping into a Hellish landscape.
* {{Hellgate}}: Reality is warped the deeper you go, until you actually enter Hell.
* HeroicFantasy: The game takes place in a world called Sanctuary that was created by rogue angels and demons.
* HeWhoFightsMonsters: [[spoiler: Every protagonist. No exceptions.]] The manual {{foreshadow}}s it with a prominent use of [[TropeNamer Nietzsche's quote]].
* HideYourChildren: In ''Diablo'', there is a peg-legged young boy in Tristram named Wirt with whom you can "gamble" to buy items. He's the only child seen during the entire game; the manual and NPC dialog indicate that all the other children have already been killed by the demons.
* HotBar: There's a hotbar where you can assign potions (perhaps most importantly, healing potions) and spell-scrolls.
* HubLevel: The town of Tristram, where you were given quests and sold loot.
* HyperspaceArsenal: The games have different inventory areas, each with a different amount of limited space, that represent easily-accessed belt pouches, holding space in a backpack, a treasure chest in town, etc. You still never ''see'' this backpack, and it can comfortably hold multiple suits of full plate armor.
* IdiosyncraticDifficultyLevels: Normal, Nightmare, and Hell difficulty levels; the game tried to make them multiplayer-exclusive, though there's a GoodBadBug to get around that.
* IfYouKillHimYouWillBeJustLikeHim: Used rather cleverly in the first game: killing its human host doesn't affect Diablo at all, so the hero tries to imprison the Lord of Terror in his own body. It doesn't work, and by the end of the second game he literally ''becomes'' Diablo.
* ImmuneToFlinching: If you take more damage than your health, you won't get stunned. Because of this, combining the ManaShield with low enough max health can make you completely immune to stun.
%%* ImprobablePowerDiscrepancy
* InformedEquipment: Despite the variety of different swords/staves/armor/shields/etc... the character models only have 3 main looks depending on if their armor is light, medium, or heavy. All weapons on model look identical for a given class of armor. This is particularly notable when you equip, say, a 2-handed sword and the character still swings a 1-handed sword like always.
* InformingTheFourthWall:
** Whenever the player tries to make his/her avatar do something that it can't, it'll explain why:
--->There's no room!\\
I gotta pawn some of this stuff!\\
Not enough {{mana}}!
** More humorously, if the player clicks on a cow over and over, the avatar will confidently state: "Yup, that's a cow, all right." "I'm not thirsty." [[OverlyLongGag "I am no milkmaid."]]
* InsurmountableWaistHighFence: Tristram is delimited by these on all four sides.
* InventoryManagementPuzzle: Trying to juggle between armor, weapons, potions, scrolls, and ''money'' could make for a very challenging time. Sure, money stacked, but the richer you were, the less room you had left in your inventory. Even worse, due to a glitch it became impossible to buy the most expensive possible shop armor in the game because carrying enough gold to pay for it meant there wasn't enough room for the item itself!
* InvincibleVillain: For the first two games and most of the third game, all you character does by trying to defeat the [[DemonLordsAndArchdevils Great Evils]] usually only ends up helping them in some way, to the point that the first game actually ends with [[TheBadGuyWins Diablo winning anyway despite his death at the hands of the hero]].
* InvisibleMonsters: The genuinely creepy The Unseen, which do come visible when they attack, but before that could fill the entire room without you knowing it. Also, due to a bug in the level generation routine, they do not respect the safe zone around the entrance. So when you just arrived in the level and you are gathering your bearings, casting {{Mana}} Shield, checking item durability, etc., they could be ''[[RightBehindMe right behind you]], getting closer''. And if this is multiplayer mode, your gear is now on the floor next to a sea of enemies right at the stairs.
* IrrelevantSidequest: Played straight in the two first games, when the player character, on his way to killing demons that threatened a small town or destroyed it and overran the world, also can collect medicinal herbs for people suffering from random diseases, recover heirlooms with purely sentimental value, seek out treasure troves completely unrelated to demons, and ''help a not immediately hostile demon because he offers you a reward''.
* IsNothingSacred: Pepin says that page's quote when you report to him that demons have stolen a sign from someone's home. He is disturbed by the idea that the demons from the labyrinth have become bold enough to have ventured through the village at night.
* IsometricProjection
* ItOnlyWorksOnce: One possible quest is finding the legendary ''Anvil of Fury''. Griswold says that this artifact will allow him to craft many wonderous weapons against the forces of Hell. When you bring it to him, he creates a unique sword for you and that's it, the ''Anvil of Fury'' is never used ever again.
* JustYouAndMeAndMyGuards:
** In single-player ''Diablo'', the Archbishop Lazarus is accompanied by two named witches; while this alone might not count as this trope (seeing as it can be considered a trio of bosses), the pack of Hell Spawn and Advocates that emerge from a disappearing wall ''does'' most definitely count.
** Diablo himself is in a room with lots of high-level mooks, though he can be triggered by way of ranged attacks that leave the mooks out of the fight.
** Most of the unique monsters tied to quests come with a cohort, notably including The Skeleton King and The Warlord of Blood. All of the regular uniques come as part of a group of regular monsters of their same type, though that's more of an inversion as the mooks come with a [[KingMook boss]] rather than the [[FlunkyBoss boss bringing along some mooks]].
* KeystoneArmy: In the single player game, all surviving monsters die when Diablo is killed.
* KingMook: The game may pick several from a selection of {{Palette Swap}}ped versions of the normal mooks as incidental encounters in the [[{{Roguelike}} randomly generated dungeons]].
* LargeHam: All the NPC characters to some degree; given their limited sprites, their voice actors had to compensate. Adria takes the cake, though; all her lines are chock full of portentous pseudo-wisdom, and delivered in a thunderous, over-dramatic voice.
* LastOfHisKind: Deckard Cain is the last of the Horadrim.
* LawOfChromaticSuperiority: The Diablo series introduced the colouring of items that has since become standard in many [=RPGs=]. In ''Diablo'', white was normal, blue magic and yellow unique.
* TheLegionsOfHell: Numerous and diverse in this series. You will be fighting them a lot.
* LevelDrain: Yellow zombies (the "Black Death" variant), which ''permanently'' reduced your max HP every time they landed a successful hit. And certain Shrines would permanently reduce your max mana.
* LevelMapDisplay: Especially necessary given that the maps are randomized.
* LevelUpFillUp: This occurs in ''Diablo'' and the sequels, where both your health and mana is restored on leveling.
* LifeDrain: One possible weapon special ability is healing your character when you damage opponents.
* LifeMeter: The LifeMeter takes the form of a globe filled with red liquid, the same color as the life potions.
* LimitedUseMagicalDevice: Most spells are available in one-use scroll form as well as in SpellBook form, which teaches the spell to the reader permanently (or increases the level for that spell). The scrolls have lower requirements, making them more usable for the non-mage classes.
* LinearWarriorsQuadraticWizards: Although spells could be learned by anyone with sufficient magic stat points, Warriors and Rogues often found themselves limited in learning capability without high magic-boosting equipment. A few of the game's most useful and powerful bread-and-butter spells often hit the required magic stat requirements way before maximum spell level, forcing non-sorcerers to rely on Enchanted Shrines that are difficult to come by. Additionally, spell damage were also frequently dependent on actual magic stat values. In a game that pretty much taught you to either kill overwhelming odds before they touched you or handle them one at a time (which required you to rely heavily on environment), spell-casting, and consequently the character with inherently superior spell-casting qualities, becomes the staple of endgame strategy.
* LoadsAndLoadsOfLoading: There's a particularly JustForFun/{{egregious}} example occurring when the player opens the door to the Butcher's room. This was presumably because the game had to access his infamous utterance [[CatchPhrase "Ahh, fresh meat!"]] on the CD.
* LongRangeFighter: The Rogue specializes in archery.
* LuredIntoATrap: Archbishop Lazarus led a group of people from Tristram into the Cathedral to rescue Prince Albrecht, the little boy who he himself made a vessel for the title archdemon. He lured them into the second level, where he left them to die at the hands of the demonic Butcher. Griswold and Farnham were the only survivors of the attack, which left Griswold with a crippled leg and Farnham with a shattered mind and a broken spirit.
[[/folder]]

[[folder:M -- R]]
* MacGuffin: The series is loaded with this trope, almost every quest has you off finding a [=MacGuffin=] needed to complete a side-quest or to move the plot forward. Optional sidequests in the first game has you go down into the church labyrinth to find a [=MacGuffin=], (''Ogden's Sign, Magic Rock, Anvil of Fury, Black Mushroom+Monster Brain''), and then bring it back to the quest-giver NPC in Tristram. One that must always be brought back however, is ''Lazarus' Staff'' which is needed to access Lazarus' lair, and always happens to block the access to the final labyrinth level, Diablo's level.
* MadeOfEvil: All of the Prime Evils and the Lesser Evils. No exceptions! Hell, the BigBad himself became the game's equivalent to {{Satan}}.
* MadeOfExplodium: The occasional explosive barrel and fireball.
* MageMarksman: The series each features one such character playable starting with the Rogue, an archer who was the middle ground of magic users between the Sorcerer and the Warrior.
* MagicIsAMonsterMagnet: Attracting demons is an InformedFlaw of using magic, but since you have a fair chance of being torn apart by them any time you set foot outside your house ''anyway'', at least you'll be better able to defend yourself...
* MagicIsEvil: It's an explicit part of the setting that most forms of magic carry a high risk of corrupting the user and making them into a servant of the demons. The only ''definite'' exception is necromancy, as {{necromancer}}s are too TrueNeutral and unconcerned with fleeting personal power to fall to the lure of demonic might. Most people in the setting are fine with magic despite this, oddly enough.
* MagicKnight: The Monk class from ''Hellfire''. In the original game, the starting class mostly just affected the starting stats and character art, so it was possible to build any class into at least a partial spell caster by spending your level-ups right, although every class had a limit on certain stats.
* MagicStaff: The series loves these. The first game had elaborate staves with some of them even having [[DoubleWeapon blades on either end]]. Staves are also the only item to have spell-charges.
* MagmaMan: Magma demons, [[AllThereInTheManual which were created from Mephisto's foul blood spilled on Hell's lava]]. While they are made of lava, the boulders they hurl only do fire damage.
* {{Mana}}: It's the fuel for spells of all types.
* ManaMeter: ''Diablo'' uses round glassy "vessels", whose level of fullness varies.
* ManaPotion:
** Mana Potions restored your character's mana.
** Magical weapons could have a special ability that restored your mana when they hit an opponent.
* ManaShield: [[TropeNamer The eponymous spell]], which is the lifeblood of the middle-to-late-game Sorcerer, not only reduced all damage by a third but redirected ''all the rest of the damage'' to mana instead of health. In fact, due to a famous glitch, a high-level Sorcerer is well-advised to have ''as low of a health count as possible'', enabling him to completely avoid stun from high damage attacks.
* TheManBehindTheMonsters: ''Diablo'' subverts this trope with the Seven Great Evils: despite leading the LegionsOfHell, the Prime Evils and Lesser Evils don't look humanoid in any way themselves; it says something that the only one who look vaguely humanoid, Andariel, is a giant woman with claws and SpiderLimbs.
* ManBitesMan: In the tie-in novel ''Legacy of Blood'', the villain is bitten on the neck by a woman he's about to torture. He starts to panic, thinking she might be a vampire, then realises she's just acting out of desperation.
* MascotMook: Fallens and Goatmen are the better known enemies of the franchise, appearing in all 3 games, and receiving some backstory in ''Diablo III'' (the former are minions of Azmodan who [[MeaningfulName fell]] in disgrace, the latter are former humans who were transformed by Vizjerei mages).
* MatteShot: They're not technically Matte Shots, but the same concept appears here. The game had what were essentially paintings for a background with characters and monsters moving on top of them. There were areas you could go (floors, steps, hills) and areas you couldn't (walls, cliffs, etc.). The action took place over top of a painting, like in a Matte Shot.
* MaximumHPReduction: The Zombie [[UndergroundMonkey variation]] Black Death could do this with their punches.
* MedievalEuropeanFantasy: Tristram plays this up in full force.
* MegaDungeon: There is one 16-level dungeon in the game, broken up into four distinct areas.
* MindOverMatter: Telekinesis is a spell. It can be used to push back monsters, but is mostly useful for opening doors and chests that may be booby-trapped. The manual states that when taught this spell, trainees are placed in a prison cell and the key is left out of their reach. Those who aren't good at it will be there for a while...
* MiniBoss: Unique monsters may play this role.
* MinimalisticCoverArt: [[http://upload.wikimedia.org/wikipedia/en/d/d9/HellfireCoverSmall.jpg The cover]] the ''Hellfire'' expansion pack.
* MinimalistRun: This was played to the extreme by Beyond Naked Mages. Players looking for extra challenge not only would ignore beneficial items, but would actively seek out cursed and damaged items which lowered the player's stats.
* MisbegottenMultiplayerMode: Friendly fire. It was still possible until the mage learned Chain Lightning, after which his allies were forced to take cover behind walls every time monsters showed up.
* MoneySpider: ''Everything'' you slay can drop gold, from [[BigCreepyCrawlies giant bugs]] to [[BigfootSasquatchAndYeti yetis]] to [[DemonicInvaders demons]].
* MontyHaul: The series and the majority of its clones tend to be like this in the end game. Bosses and major loot caches will often release a screen-filling fountain of gold and enchanted gear- from which players will pick the one or two very best pieces and leave the rest lying on the floor. At early levels, however, the player will want to keep anything that's better than the standard vendor gear. For a game where the whole point is to constantly upgrade your equipment, the progression is fairly even.
* MrExposition: Deckard Cain is the only character besides Diablo himself who will appear in all three games. His role is always the same: talk in a monotone voice about [[PlayTheGameSkipTheStory the backstory nobody's interested in]].
* MultiMeleeMaster: Useful due to BreakableWeapons. Also, some enemies are weak against clubs, others against swords, and axes are useful against anything, but all axes are 2-handed, so you give up on using a shield.
* {{Namedar}}: ''Diablo'' has an old man who actually works as the resident Namedar: his job is to identify any unknown item you pick up so you can sell it.
** Under the hood, an object's name in Diablo is calculated as a function of its various attributes (for example, the suffix "of the Tiger" will always give between +41 and +50 max HP), so in the model world of the game, Namedar is a real physical law, and names following the pattern will be automatically deduced for, say, novel items created using a game editor.
* NameOfCain: Subverted. Deckard Cain is a LastOfHisKind scholarly good guy who will identify your magical items for you.
* NamesToRunAwayFromReallyFast: ''Black Death'' in ''Diablo'', and their ability to ''permanently'' lower your health by one point causes even experienced players to avoid them like the plague. The fact that they can crash the game when dealing a finishing blow to the player in earlier versions makes it worse.
* NewGamePlus: Once you complete the main plot, you get a sort of 'New Game Minus', which lets you restart the plot but keep your stats and inventory.
* NippleAndDimed: Several female corpses were completely stripped. The Succubi, who became increasingly frequent enemies towards the end were wearing little more besides thongs, and showed quite a few details.
* NoBodyLeftBehind: {{Averted|Trope}}; not only do corpses stay behind, the bodies of acid/poison spitters create a pool of acid that can damage you if you stand on them.
* NoHeroDiscount: Demons about to overrun the countryside? Tragic. Want your armor repaired? Cash up front!
* NoManOfWomanBorn: In the ExpandedUniverse novel ''Demonsbane'', the BigBad has a glyph on itself that makes it invincible to all living creatures. The twist, then, is that [[spoiler: the hero of the novel turns out to have been DeadAllAlong.]]
* NonHumanHumanoidHybrid: Humans in this setting are the descendents of angels and demons.
* NonindicativeName: [[NamesToRunAwayFromReallyFast The Black Death]] are colored bright yellow.
* NotDistractedByTheSexy: The succubi were ''so'' sexy they actually caused some controversy; their bosoms and rear ends are clearly visible, and they aren't wearing anything except arm warmers and thigh-high boots. The player characters don't seem to notice. The players, on the other hand, that's another story.
* NothingIsScarier: The dungeon levels are large and there can be quite a distance between the monsters, which only adds to the suspense and scariness of the game. Even more so because there are monsters that can turn invisible and sneak up on you, and others that charge you from far off-screen with a blood-curdling roar.
* NoticeThis: {{Averted|Trope}}; items on the floor were otherwise unremarkable and only highlighted when the mouse hovered over them. Now imagine rings and amulets, which have a "on-floor" graphic that's a blue ring a couple of pixels across. On a blue floor. In a dark dungeon. While the unofficial expansion added a spell which highlighted every lost item on the floor, and there ''was'' a built-in zoom function in the game, cooperative multiplay could (and often did) degenerate into the equivalent of searching for a dropped contact lens whenever that distinctive "ding!" was heard.
* NumberOfTheBeast: Diablo himself has 1,666 HP.
* ObviouslyEvil: While ''Diablo'' plays this trope straight with most of the antagonists, who are almost all blood-thirsty, cannibalistic, AlwaysChaoticEvil demons, this wasn't the case with Archbishop Lazarus from the [[CorruptChurch Church]] [[LightIsNotGood of Light]]... who turns out to be TheDragon for Diablo, an EvilChancellor and a ManipulativeBastard who tricked a gradually turning insane king into executing his own wife and people.
* ObviousRulePatch: If the game detects items created by the duplication glitch, it will destroy them, with an attention-grabbing status message in the chat log. Unfortunately (or maybe not), its detection range is ''extremely'' limited, and it can only catch dupes if they're both on the ground, in the same area. Oddly, the dupe bug itself was never fixed.
* OneBulletAtATime: The sprite limit could be reached very easily with one Chain Lightning spell with many enemies in range or multiple Fire Wall spells. Sure, it's not a gun, but you still won't be able to cast any more until the effects finish up.
* OneManArmy: Every playable character in the ''Diablo'' games can, and will, kill hundreds (if not thousands) of demons and other creatures over the course of the adventure. You venture into the depths of hell killing every demon, critter, and monster in your path including Diablo himself.
* OneWordTitle: AntagonistTitle, Diablo.
* OnlyOneName: Deckard Cain is the only NPC in the two first games with a first and last name.
* OtherworldlyAndSexuallyAmbiguous: Accoring to {{Word of God}}, demons are genderless.
* OurDemonsAreDifferent:
** In the setting, demons are psychotic hordes sometimes created or altered by their leaders, the Prime Evils and the Lesser Evils. Even though they seem to have free will, they still do the bidding of their particular masters without question. They come in a huge variety of forms -- from almost-human to green porcupines to [[BlobMonster the Blob]] to totally alien. In the second game, many enemies are not true demons, but creatures mutated by the forces of Hell. Killing demons primarily sends them back to Hell, which is the reason that the Soulstones were created -- the angels needed a way to keep the Prime Evils from returning.
** The undead are not demons but corpses animated by the power of the [[DemonLordsAndArchdevils Prime Evils]], and the weaker creatures like Scavengers are mutated once-natural animals.
* OurGargoylesRock: Gargoyles were statues until you got too close, and turned back to stone if they took enough damage, making them a lot easier to hit, and surprisingly not much harder to finish off, although they do regenerate HP faster.
* OurZombiesAreDifferent: Even though it's more of a demon invasion, the game had a unique view of where zombies come from, although it's the only game in the series where this is mentioned. From the manual:
-->Zombies are formed from the corpses of men executed for the most depraved and degenerate crimes against the innocent. They are driven by both the hatred that consumed them in life and the undead hunger for mortal flesh.
* PaletteSwap: The different monster varieties are shown in this fashion.
* PathOfInspiration: The lore, expounded in tie-in novels, has two significant cases: the Triune, an apparently benevolent church that was actually a front for the machinations of the three Prime Evils. Much later, the Black Road did much the same thing, but it was a more obvious deal-with-the-devil situation.
* ThePearlyGates: The Diamond Gates lead to the High Heavens. In the millennia that the Diamond Gates have stood, they have withstood countless sieges by TheLegionsOfHell, but have never fallen in the entire history of the Eternal Conflict. However, in ''VideoGame/DiabloIII'', during the end of Act III, those gates finally fall when Diablo, who has become the Prime Evil, makes his grand entrance into Heaven, setting up Act IV, where [[HellInvadesHeaven you have to save Heaven from Hell]].
* PerpetualBeta: ''Diablo'' had a long history of {{Game Breaking Bug}}s, most notably item-duplicating, in its day.
* PhysicalGod: The Lord of Terror himself.
* PhysicalHell: Of course, there wouldn't be a game otherwise. Not there originally, Diablo makes it literally out of terror incarnate.
* PixelHunt: You could hear the sound of a ring drop from a monster, and spend the next 10 minutes carefully searching the ground around you. Fortunately, ''Hellfire'' added the Search skill/spell. Also, since you could pick up something as soon as the cursor was in the same square, you had to search much less than you'd think at first.
* PlanetHeck
* PoisonMushroom: Cursed equipment, adding a bit of a gamble when you identified magical items. Cursed items reduced attributes and didn't sell for much money.
* PowerupLetdown:
** Mana Shield absorbed less damage at higher levels due to a bug.
** Levelling up Chain Lightning would cause you to run into the sprite limit in one shot, causing disappearing lightning sprites and making it unreliable.
** Fighting your way through the ''Chamber of Bone'' to obtain the Guardian spell may seem like an incredible reward when really, it's one of the more 'meh' fire spells in the game. On the bright side, the Chamber of Bone always has good loot chests.
* RandomDrops: A given, taking into account the genre of the game.
* RandomlyGeneratedLoot: More or less the TropeCodifier for this sort of loot dropping. It featured individual pieces of equipment with random variations in stats, but special effects were mostly fixed to specific item types.
* RandomlyGeneratedLevels: Randomized dungeon layouts which include a handful of required rooms.
* RandomTransportation: The Phasing spell teleports you a fixed distance in a random direction. There's also a shrine that does the same thing, with the appropriate flavor text: "Wherever you go, there you are."
* RangedEmergencyWeapon: The bow is hardly the warrior's most useful weapon, but it can be handy if an enemy is behind a grate or if you need to exchange fire with something that won't let you close enough to engage in melee for a meaningful length of time.
* RareCandy: The original game had elixirs for the four primary stats (Strength, Dexterity, Magic, and Vitality) which were occasional drops in the dungeon and even rarely purchasable in the stores from level 26. With enough cash, one could patiently reach the maximum values for three of the four stats (Vitality potions aren't on sale) by repeatedly joining multiplayer games and seeing if Adria sold any elixirs.
* RareRandomDrop: The games feature items that aren't just randomly dropped, but ''randomly generated'' from thousands of potential combinations of attributes, special abilities and base weapon types.
* RedFilterOfDoom: This happens when you die.
* ReedRichardsIsUseless: This was mocked by players way back when it came out: some nameless NPC, sole survivor of the traitorous Archbishop Lazarus's doomed expedition into the dungeon beneath Tristram, sputters out his dying words and sets you a quest leading to the first major boss of the game, the Butcher. You may be a new, inexperienced adventurer without much magical talent to speak of (depending on your class), but you're carrying ''healing potions''.
* ResurrectiveImmortality: Part of the reason the Eternal Conflict between Heaven and Hell has been eternal is that both the [[CouncilOfAngels Angiris Council]] and the [[BigBadDuumvirate Prime Evils]] have this. Even if their bodies are completely destroyed, they will eventually return. The only way to stop this regeneration is to trap their spirit into a Soulstone, but thanks to [[TheMole Izual]], even that's only a temporary setback at best.
* RewardingVandalism: The games are loaded with destructible [[CrateExpectations crates]] and [[ExplodingBarrels barrels]].
* RobbingTheDead: The games allow you to loot crypts, coffins, urns, graves, piles of bones, and corpses both fresh and old.
* {{Roguelike}}: The original game shows clear inspiration from this genre, especially ''{{VideoGame/Angband}}''. Examples include the focus on dungeon crawling, randomly generated levels, the need to identify potentially-cursed magical items, and the risk of permanent damage to your character (the game was originally intended to have straight up permadeath, but Blizzard ultimately decided against this). Later games in the series moved away from this, however.
* RougeAnglesOfSatin: Fanfiction often focuses on the mysterious order known as the Rouge Archers.
* RuinsForRuinsSake: The first series of dungeons are supposed to be located under a tiny village church, and are a randomly-generated maze of passageways, tombs, and other rooms that go on for several sub-levels with no overall plan. One wonders what madman designed their church's undercroft, or how the people ever held services there. This was {{handwave}}d in the [[AllThereInTheManual manual]]. The catacombs were built explicitly to be a maze that would safeguard the SealedEvilInACan... that has broken loose and made the deeper levels even more convoluted and filled the place with monsters and death traps.
* RunningGag: Mentions of Wirt's wooden leg have spread to the ''other'' Blizzard game ''VideoGame/{{Warcraft}}'' (and all sequels/spinoffs that follow).
[[/folder]]

[[folder:S -- Z]]
* SanitySlippage: Implied to be part of why your character [[spoiler:jams Diablo's Soulstone into themselves at the end, alongside some DemonicPossession]]; the sheer and literal hell they travel through gradually quiets your protagonist down, and ''Diablo II'' insinuates that the Rogue and Sorcerer especially were haunted by their travels. The Warrior? [[spoiler:He becomes the canonical Soulstone bearer, and inevitably the next host of Diablo once he gets worn down even ''further''.]]
* SaveScumming: You could save scum the normal way.
** Saving and reloading causes Adria and Griswold to re-stock their inventories. This means you can throw down a save in front of either of them and reload until they have the equipment you want to buy.
** Goat Shrines' and Cauldrons' effects are picked randomly from the list of all shrines and set, making it wise to save beforehand in case they may have the bonus you want-- [[BlessedWithSuck or don't want]].
* SavingTheWorld: What you are supposed to do.
* SceneryGorn: The Butcher's room in ''Diablo'', red with blood and full of human bodies mutilated, impaled and/or hung up on hooks.
* SecretCharacter: ''Hellfire'' came with two secret, "unlockable" characters: the Bard and Barbarian. The Barbarian has since reappeared in the sequels.
* SelfImposedChallenge: Naked runs (that is, runs with no equipment) are popular for classes that can handle them. The first game, however, takes it one step beyond with the Beyond Naked Mage, which uses any and all cursed gear it finds, and ''only'' cursed gear. (When there's a choice of gear for the same slot, one must use the item with the greater penalties). In addition to providing an extra level of challenge, this also provided a type of IronicHell for {{Griefer}}s who [[KickTheDog lured players into being killed by monsters in order to steal their equipment]]. [[BestServedCold Have fun with some life-decreasing jewelry, jackass]]!
* ShootTheShaggyDogStory: [[spoiler:The second game reveals that not only do all of the goals and accomplishments of the first game become pointless, it also turns out that every player character becomes corrupted and begins tormenting humanity as demonic beings themselves. The protagonist (canonically the Warrior) finally defeats the BigBad, only for it to be revealed that he was being played all along, and is corrupted by its Soulstone, eventually being transformed into the new Diablo himself. Also, the Rogue becomes Blood Raven, the Sorcerer becomes The Summoner, and Tristram is destroyed, along with nearly everyone in it being slaughtered or turned into even ''more'' demonic pawns.]]
* ShieldBash: It deals same damage as a punch or kick, but it gives you the chance to block enemy melee strikes.
* ShoutOut:
** There was a staff called the "Rod of Onan," which could never ever be a reference to the Biblical story of [[SelfAbuse Onan]]. It summoned golems from the earth.
** One [[UndergroundMonkey sub-type]] of Lightning Demon is called Storm Rider, a nod to ''Music/RideTheLightning'' from Music/{{Metallica}}.
** One unique saber is called the "[[Franchise/StarWars Lightsaber]]".
** Killing Zhar, the grumpy wizard in the catacombs, leads to the PC [[BondOneLiner saying]], "[[Film/PulpFiction I'm sorry, did I break your concentration?]]"
** One of the unique mage is named "[[ComicBook/JudgeDredd Dreadjudge]]".
* SidetrackBonus: Because of its randomised dungeons, moving forward in the series is largely a matter of luck, with the player as likely to find an empty dead end as anything else, but exploring a whole area before going on will naturally yield some treasure and some unique monsters.
* SinisterMinister: The Archbishop Lazarus.
* SkywardScream: The first game's ending, after the hero plunges the Soulstone into his forehead.
* SlidingScaleOfShinyVersusGritty: The games are gritty in the extreme, depicting a world invaded by demons who decorate with blood, limbs, impaled corpses and tortured souls.
* TheSmurfettePrinciple: Only one of the three classes (the Rogue) was female. ''Diablo'' was either more or less balanced with the inclusion of the ''Hellfire'' expansion depending on how you approach it. It added the male monk class by default, plus mildly altered remakes of the Warrior and Rogue that could only be unlocked by futzing with a system file.
* SortingAlgorithmOfWeaponEffectiveness: The item spread is carefully controlled by which area of the game you're in; the starting levels will give you nothing but light armor, weak weapons of all kinds, and marginally magical items. As you continue through the game, the range of droppable items increases, so that Dagger of Poking you picked up in the cathedral will eventually be replaced by the Pointy Short Sword of Sharpness in the catacombs, the Serrated Flamberge of Wounding in the Caves, and the Butt-kicking BFS of Evisceration in hell.
* SoundtrackDissonance: The [[https://www.youtube.com/watch?v=gMAbNFptzAA Cain Rap.]]
* SpellBook: One of the less abstract uses of the spell book trope in video games. A spell book, when read, simply adds that spell to your repertoire so that you can use it as much as you want in future (as long as you have enough {{mana}}). If you find another book of the same spell at a higher level, reading it will let you cast a more advanced version of the same spell.
* StopPokingMe: Clicking the town's cow would cause it to moo. Clicking it repeatedly would make your character start commenting on it. "Yup, that's a cow all right..."
* StoryBreadcrumbs: The first game had a setup like this. Books placed on pedestals throughout the catacombs under Tristram would tell you the story how Diablo came to be buried under Tristram, along with other events that precede the game. That said, the game's manual contained all the same story elements in more detail.
* StoryDrivenInvulnerability: When you finally meet the [[TheDragon Archbishop]], he stands there and speechifies at you for a good while. Neither side can attack while he's talking, but you ''can'' run out of the room, which is recommended as he's accompanied by a number of minions and it's easier to kill him if you've lured them out piecemeal first.
* StoryToGameplayRatio: The series is a little odd in this regard. There's lots of story in terms of dialog from [=NPCs=] and other characters, but all of it can be (and often is by most players) ignored by those who just want to jump into the quests. The universe has a really good storyline but it is safe to say that the game's immense popularity is not because of its story. The game would likely still be as popular as it is even if it had virtually no story
* SubliminalSeduction: The game contains the satanic message (at least in the game files): ''Eat your vegetables, and brush after every meal.'' (backwards, of course)
* SuccubiAndIncubi: Diablo has an army of succubi. Albeit, they're not particularly sexual creatures, rather color-coded, fireball-flinging, batwinged, naked women.
* SuicidalCosmicTemperTantrum: According to the manual, the minions of Baal, the Lord of Destruction, seek the undoing of the universe.
* SwordOfPlotAdvancement: Lazarus's Staff. It's not a weapon you can equip, but you need to give the staff to Cain so the portal to Lazarus' lair opens afterwards.
* TacticalDoorUse: Closing doors will stop certain demons in their tracks. Combine this with a grate nearby that allows you to shoot through to the other side of the door, and soon you've got a pile of dead demons lying on the other side of said door.
* TakeYourTime: You can dillydally as much as you want in completing the quests you're given.
* TeaserEquipment: The enterprising young boy Wirt randomly sells a high-level item, but you're unlikely to be able to purchase it until later. Even though that item is [[RandomlyDrops generated at random]], it's generally of a higher level than what the normal item shops are selling, though not always relevant to your class. By the time you'll generally be able to purchase it, the gear in other shops has largely caught up.
* TeleportSpam: Those wacky teleporting mages.
* ThisWasHisTrueForm: When you slay Diablo and pull the soulstone from his forehead, his body reverts to that of Prince Albrecht, whom Diablo had possessed. (It is unclear whether Albrecht is alive or dead at this point.)
* ThongOfShielding: A curious case are the succubi, because they seem to wear only a "low-cut" thong when you look at them from the front, but are clearly butt-naked when you look at them when they turn around.
* TimedPowerUp: Every game since ''VideoGame/DiabloI'' features Shrines, stationary objects with random effects that commonly include temporary buffs to speed, defense, offense, experience gain, etc.
* TruceTrickery: Following the end of the Sin War, there was a pact made between the High Heavens and the Burning Hells that they would not interfere in the affairs of Sanctuary. To absolutely no one's surprise, the demons break the pact by means of the Dark Exile of Diablo, Mephisto and Baal to the mortal realm, resulting in all Hell breaking loose in Sanctuary. Tyrael is limited in what he can do as an angel because if word of what's up reaches the rest of the angels, they may well decide to destroy humanity along with the demons because of the [[BornOfHeavenAndHell origin of humans in this universe]], which many angels do ''not'' take kindly to.
* TurnUndead: There are three types of enemy: animal, undead, and demon. For each of the first latter two, there are certain types of weapons (clubs for undead, swords for animals) that do extra damage against that type (although they will also do less damage against the other type, this was dropped in later games), and some uniques items have specific attributes that only apply against one of the last two. There's also the Holy Bolt spell, which specifically harms only undead.
* TheTurretMaster: The Guardian spell summons a three-headed beast that would shoot firebolts.
* {{Twinking}}: Thanks to rampant item duping glitches, hacks, and exploits, in the game's heyday you couldn't wander into a public online game without being offered a full set of the most powerful non-LevelLockedLoot available.
* UnbreakableWeapons: There's a durability exploit in which, through the use of Hidden Shrines, the player can raise the durability of an item to the specific value of 255, which the game recognizes as indestructible.
* UndergroundMonkey: The games were full of this. Every single enemy in the games, apart from quest specific bosses, came in various levels of strength denoted by colour and had otherwise identical sprites as others of its type. It's mentioned in the first game manual that this is because the Prime Evils, the leaders of the demons, would alter their servants forms to better deal with whatever threat they were facing at the time.
* UnidentifiedItems: You can take your unknown items into town and have Cain identify them, or buy a scroll to do it (for the same price of 100 gold).
* UnintentionallyUnwinnable:
** ''Diablo'' disables the "SAVE" option when you die. However, it does so a few frames late, and during these few frames it's difficult, but possible to save ''already dead'' and watch your character die instantly each time you reload. There's only one save slot. While you ''can'' start the game over with your character's current stats (much like a NewGamePlus, except accessible from the very beginning), you'll lose anything you had left lying around in town (which is likely to be a lot, due to GridInventory and [[EverythingFades Nothing Fades]]). But hey, it's your own damn fault for saving when you knew you were dead.
** You can just plain save while surrounded by monsters and one hit from death. This is obviously user error. Another variant is to save immediately before getting dealt a final blow such as by a projectile, which is more of an accident.
** This can screw up first-time ''Diablo'' players who come from ''Diablo II.'' There, you CAN save and exit when you die and get away with it. In that game, you will be brought back to town carrying whatever was in your inventory when you died. Anything on the ground or that you dropped(potions, usually), were gone... If you're used to that, the change in save-after-death in the original can burn.
** Multiplayer characters can screw up in a different way: there is no regular save function and dying in multiplayer mode causes your items to fall to the ground. If you die in a place where you can't get them back (there is one notable enemy type that ignores the safe radius around level entrances and is also invisible, so you can die very quickly after entering a level, only to see a mass of hidden ones manifest around the stairs) and have no choice but to leave the game, you lost all of your items permanently. Good luck completing the game after that.
** ''Diablo'' has strong {{roguelike}} influences and can screw you over in numerous other ways. Black Death in particular take away 1 hit point permanently on striking (with no indication that this is the case) and can render the game unwinnable if you are playing very badly and get hit hundreds of times, leaving you with a tiny amount of health. You have to try really hard to make this happen, though.
** It's possible to make the game unwinnable by abusing the Chamber of Bone entrance in a hilariously stupid way. You need to teleport there before you use the book to open it (either with a scroll of teleport or using a scroll of town portal then going there from town) and leave yourself stuck in a sealed room. Yes, you need to be completely stupid to do this unless you're doing it intentionally for the lulz.
* UnusualHalo: Imperius, the leader of the CouncilOfAngels, has a crown-like metal halo that matches the design of his TwentyFourHourArmor. The other angels generally don't have halos.
* TheUsualAdversaries: The series, as one can probably guess, primarily has the demons of the Burning Hells in this role, though undead are also a big threat early on.
* TheVeryDefinitelyFinalDungeon: The final battle with Diablo takes place on the lowest level of Tristram Cathedral.
* VideogameFlamethrowersSuck: Inferno was a very slow moving flame that crept along the ground, had a very short range, almost always missed if cast at an angle due to the game being grid-based and its only benefit was that it could hit multiple targets if they were right in your grill. You would [[RandomlyDrops probably]] get a book of this spell at about the point where the first Lightning Bolt staves started to show up, which had the same line damage effect, unlimited range, a much wider area of effect and did about five times as much damage.
* VillainBasedFranchise: The game's title is the name of the main antagonist. Do we really need to say more?
* VillainousBreakdown: In the backstory, King Leoric is [[DemonicPossession possessed]] by [[BigBad Diablo]] and effectively starts having a Villainous Breakdown while he's still a good guy. He doesn't remain good for long when that happens. He starts getting increasingly paranoid and less sane, until finally when Diablo leaves him, unable to take over completely, he's a raving madman. When Lazarus takes his son as a more fitting vessel for Diablo, it goes even more downhill from there -- he randomly tortures and kills villagers he suspects of abducting the prince and finally has to be killed by his own most loyal knights.
* VoiceOfTheLegion: Many characters, but especially Archbishop Lazarus.
** In the expansion, Baal himself has the voice that echoes and can shake mountains. He roars out a massive "'''ENOUGH!!!'''" in the Intro.
* VoodooZombie: The various undead are often of this kind, with powerful undead such as the Skeleton King being a result of Diablo's direct influence.
* WakeUpCallBoss: TheButcher, who is an extremely tough opponent for the part of the game he appears in, being [[LightningBruiser very fast and capable of dealing huge amounts of damage in close combat.]] He quickly becomes ThatOneBoss to lower level characters because the only way to beat him safely depends on the randomly-generated terrain spawning in such a fashion to let you plink him to death at range, or to level up your Dexterity to at least 55 so that you can trade blows with him in melee while taking fewer hits. Thankfully, he only has a 50% chance of appearing, drops a nifty unique axe when he finally goes down and you can just ignore him if you don't want to fight him yet -- his room is a dead-end and its unique shape and ''decor'' make it obvious who resides there.
* WalkingShirtlessScene: The Warrior ''sans'' armor.
* WalletOfHolding: You can have up to 5000 gold per available inventory slot, which led to a glitch where you can't buy the best armor in the game because you ''can't hold enough money''. An item added in the ''Hellfire'' expansion doubled your gold capacity to 10,000 per slot.
* WarpWhistle: The Town Portal scroll, though as the name implied, the scrolls primarily sent you back to town (which you would need to do often in order to sell off your old or excess gear, repair the gear you were using, and resupply on essentials such as potions, ammunition and Scrolls of Identify or Town Portal.
* WasOnceAMan: Humans possessed and altered to fit their shape by the Prime Evils, through DemonicPossession. Diablo's body turns back into that of the young prince at the end of the game when he's killed.
* WaterSourceTampering: One of the potential side quests involves Tristram's water supply being poisoned. When you go into the catacombs and find the spring, killing the monsters around it will turn it back to normal.
* WeaponOfXSlaying: ''Diablo'' gives clubs this effect against undead monsters, and swords receive the same effect for animals. Notably, in this game clubs will also deal less damage to animals and swords will deal less damage to undead as well (later games drop this penalization, as well as the sword bonus against animals).
* WeBuyAnything: {{Averted|Trope}}; only related items can be sold to the relevant shopkeeper -- weapons and armor to Griswold, and mage items and potions to Adria.
* WithThisHerring: Played with. In both games, you don't start out with much, but your initial equipment isn't terrible. It'll do for a bit until you can get better stuff. Justified in both games because A) you're not really all that special of an adventurer and B) the areas you're in are typically going through hard times.
* WordsCanBreakMyBones: The scrolls in the series work this way, with the written words becoming the spell as they're spoken (and consequently, disappearing). The magic books from the first installment may be similar, as they too disappear when used.
* WoundThatWillNotHeal: The Butcher's cleaver has GameplayAndStorySegregation -- while it is said that the wounds inflicted by it can't be healed because of infection, you can heal them as much as you like.
* YetAnotherStupidDeath: Killed by standing in fire.
* YinYangBomb: The entire human race is the result of interbreeding between angels and demons.
* YouAllLookFamiliar: Averted, but ''only'' for [=NPCs=]. [=PCs=] of the same class all look quite similar.
* YouAreTooLate: Archibishop Lazarus pulls this when you finally confront him:
-->Abandon your foolish quest. All that awaits you is the wrath of my Master! YouAreTooLate to save the child. Now you will join him...in Hell!
* YouCantThwartStageOne: Or Stage 2: both games end badly for team Human.
* YouHaveResearchedBreathing:
** Everything including ''rings and necklaces'' have stat and level requirements to wear them. You could wear Unidentified items, but bear the risk of it being cursed.
-->"Alas, poor adventurer -- he accidentally put on the Necklace of Self-Decapitation."
** Your Sorcerer starts out with a [[CherryTapping level two Firebolt]] and is incapable of casting Holy Bolt, which according to the lore was explicitly created to be easy to cast for anyone with no particular magical talent. It gets worse in the sequel, where the sorceress and necromancer start the game with zero magical or necromantic abilities whatsoever and rely on their staff or wand to cast anything at all.
* YouKillItYouBoughtIt: This happened to the hero; after killing Diablo and removing the soulstone from its forehead and freeing his former host, the hero rams the thing into his own forehead, becoming Diablo and taking his place.
* YouNoTakeCandle: "We strong! We kill all with big magic!" Poor little Snotspill had obtained a ''tavern sign'' depicting a sun and naturally expected it to be magical.
* ZipMode: In ''Hellfire'', your walk speed was doubled in town.
[[/folder]]

* AngelsDevilsAndSquid: The series mainly focuses on the Angels and Devils, but some Squid are present in the novels, such as the dreamers, who are stated to come from a dimension beyond both Heaven and Hell, as well as whatever Trag'Oul is (although, he's more of a benevolent squid).

** Before he came to Khanduras Leoric was originally a northern lord, this has been changed to an eastern lord.

* DeathIsASlapOnTheWrist: Only gameplay-wise, and starting from ''Diablo II'', where you lose some gold and item durability but get sent back to town to simply try again; the first game was far more brutal in dumping ''all'' of your gear where you died, making it best to either load a save, have someone help you get it back, or [[UnwinnableByDesign starting a new character because of a dead game]]. [[FinalDeathMode Hardcore Mode]] completely subverts this by outright ending a character permanently.
** Actually bringing someone BackFromTheDead in-universe usually requires necromancy, a non-permanent and ''[[BodyHorror horrifying]]'' solution that typically ends with the resurrected going straight back where they came -- and, in the hands of a combatant necromancer, with a multitude of victims in the process. Despite the rampancy of souls being disturbed across the series, next to no one has ever been truly resurrected beyond the fact that the Angels and Demons [[ResurrectiveImmortality don't truly stay down.]]

* AttackFailureChance: The early games, which were based on {{Roguelike}}s, based both melee and ranged hit chances on your Dexterity, and if it was low enough, you could forget about hitting anything with your sword or bow. Thankfully, the Dexterity issue was easy enough to fix with enough Level Ups, particularly since Dexterity also governed block chance and ranged damage.

The original ''Diablo'', after being out of circulation for years, has been re-released on GOG.

* ResurrectiveImmortality: Part of the reason the Eternal Conflict between Heaven and Hell has been eternal is that both the [[CouncilOfAngels Angiris Council]] and the [[BigBadDuumvirate Prime Evils]] have this. Even if their bodies are completely destroyed, they will eventually return.

* MagicStaff: The series loves these. The first game had elaborate staves with some of them even having [[BladeOnAStick blades on either end]]. Staves are also the only item to have spell-charges.

* DarkerAndEdgier: The first game is this compared to the sequels. Granted, the plot of all three games is fairly bleak [[spoiler: (although the third installment is more cheerful overall, particularly in the ending)]] and Sanctuary remains a CrapsackWorld, but:

** Even ''further'' enhanced by the more "realistic", dark art style of the game, which would not look out of place in a game like ''VideoGame/{{Darklands}}'', had the latter been made a few years later -- in contrast to the varied and colorful locations of D2, much less the even more colorful, slightly cartoonish signature art of ''[=WoW=]''-era Blizzard found in D3.

* BittersweetEnding: Tristram ends up a shadow of its former self, with most of its townsfolk either executed by King Leoric or slaughtered by the Butcher. But at least King Leoric has been laid to rest, [[EvilChancellor Lazarus]] is dead, and the power of Diablo is contained... for now. The PlayerCharacter implants the Diablo soulstone within themselves and immediately begin to struggle against Diablo's essence fighting them from the inside, ultimately deciding to head for a pilgrimage to the Far East for answers. The [[VideoGame/DiabloII the next game]] shows that they ultimately couldn't resist Diablo after all.

* BittersweetEnding: Tristram ends up a shadow of its former self, with most of its townsfolk either executed by King Leoric or slaughtered by the Butcher. But at least King Leoric has been laid to rest, [[EvilChancellor Lazarus]] is dead, and the power of Diablo is contained... for now. Only [[VideoGame/DiabloII the next game's]] CerebusRetcon turns it into a DownerEnding.

** There was a staff called the "Rod of Onan," which could never ever be a reference to the Biblical story of [[ADateWithRosiePalms Onan]]. It summoned golems from the earth.

* DeathIsASlapOnTheWrist: Only gameplay-wise, and starting from ''Diablo II'', where you lose some gold and item durability but get sent back to town to simply try again; the first game was far more brutal in dumping ''all'' of your gear where you died, making it best to either load a save, have someone help you get it back, or [[UnwinnableByDesign starting a new character because of a dead game]].
** Actually bringing someone BackFromTheDead in-universe usually requires necromancy, a non-permanent and ''[[BodyHorror horrifying]]'' solution that typically ends with the resurrected going straight back where they came -- and, in the hands of a combatant necromancer, with a multitude of victims in the process. [[FinalDeathMode Hardcore Mode]] completely subverts this. Despite the rampancy of souls being disturbed across the series, next to no one has ever been truly resurrected beyond the fact that the Angels and Demons [[ResurrectiveImmortality don't truly stay down.]]

* LinearWarriorsQuadraticWizards: Played with, especially in ''III'' and ''IV'', by shifting exactly what defines Warriors and Wizards. Any high-level and well-geared character is going to hit like a truck, and for most encounters a class like a Barbarian can do just fine; even the mighty Lord of Terror himself is going to fall to the equivalent of a very pointy stick in short order if it's a really powerful stick. But what matters is A.) your Legendary gear with affixes that can radically alter your class playstyle, and B.) how much damage you have to take for your build. The ranged and spellcasting classes generally get to keep their distance and take out swaths of enemies by default with plenty of tools and options, while the melee classes tend to require good affixes to keep up with the sheer amount of damage they will take to get close in the first place.

* ForeverWar: Angels and Demons are to be locked eternally in battle as a simple matter-of-fact in their Great Conflict, but a land produced in-between their realities was meant to be some sort of reprieve by one of the more hedonistic angels Inarius and his demon lover Lilith, the land of Sanctuary intended for those tired of the war. Lilith had other plans once the [[PhysicalGod nephalem]] were born stronger than both kinds, and attempted to continue the war in her own grab for power with these individuals, and both sides ended up barred from the realm for it -- until the Prime Evils decided that taking over the realm to gain a true and serious edge toward the war's conclusion was their new priority.

* ForeverWar: Angels and Demons are to be locked eternally in battle as a simple matter-of-fact in their Great Conflict, but a land produced in-between their realities was meant to be some sort of reprieve by one of the more hedonistic angels and his demon lover, the land of Sanctuary intended for those tired of the war. Lilith had other plans once the [[PhysicalGod nephalem]] were born stronger than both kinds, and attempted to continue the war in her own grab for power with these individuals, and both sides ended up barred from the realm for it -- until the Prime Evils decided that taking over the realm to gain a true and serious edge toward the war's conclusion was their new priority.

* ForeverWar: Angels and Demons are to be locked eternally in battle as a simple matter-of-fact in their eternal Great Conflict, but a land produced in-between their realities was meant to be some sort of reprieve by one of the more hedonistic angels and his demon lover, the land of Sanctuary intended for those tired of the war. Lilith had other plans once the [[PhysicalGod nephalem]] were born stronger than both kinds, and attempted to continue the war in her own grab for power with these individuals, and both sides ended up barred from the realm for it -- until the Prime Evils decided that taking over the realm to gain a true and serious edge toward the war's conclusion was their new priority.