History YMMV / TitanQuest

** The Nixies shoot cold projectiles (which reduce the accuracy of your own ranged attacks), move very fast, and are invincible while moving due to turning to water while they do, making them an annoyance to hunt them down.

** [[spoiler:[[OptionalPartyMember Hiring princess Ylva]] as your party member. She's lightning fast and scale with your level. Her skills include [[FlechetteStorm daggers throwing]] and [[FoeTossingCharge charging at enemies]]. With Ylva around, she can practically do all the work for you.]]

** The Nixies shoot cold projectiles and move very fast, making them an annoyance to hunt them down.

* OnlyTheCreatorDoesItRight: While the THQ Expansions and DLC have brought lot of [[AntiFrustrationFeatures qualities of life]] and additional new content, the general consensus from the fanbase is that they couldn't match Iron Lore's level of quality and polish.

** "Sick lewt" requires you to actually wield the Sickle of Kronos. Not only is it a very rare drop from Ormenos, but it has insane requirements in the form of player level 80 (which in the original game maxed out at 65 mind you), 3000 strength and 1000 intelligence (booth of will rarely go over 600 even on Legendary). Better find some of that also rare requirements reducing equipment.

** Nidhoggr ~ Tormentor of the Dead has an attack where he repeatedly summons groups of Frozen Dead around you, which [[SuicideAttack explode if you get too close to them]], doing a large amount of damage and stunning you briefly. Needless to say, with Nidhoggr's other devastating attacks (including 3 variants of elemental breath and a ground stomp that can stun you for even longer) getting his by this can quickly be fatal if you're unlucky. The problem is that Nidhoggr can and does regularly summon one of the zombies ''right on top of you,'' causing it to explode before it even manifests and making the attack literally impossible to avoid. Fortunately he has a slight delay after his summon animation which means he probably won't be able to attack you again before the stun wears off and you can run for it while chugging a potion, but it can still leave you in a dangerous situation, especially if he nearly had you cornered already when he does it.

*** In the same bonus area is Nate. [[OneHitKill A single punch from him is enough to murder you]]. He also has boss' high resistances on top of his undead resistance. The only safe way to kill him is using range attacks with enough distance to avoid provoking him. It can be very boring [[DamageSpongeBoss to wade down his health by small increments for 30-45 minutes]].

** Pure Dexterity characters are also not supported, as late-game armour requires either pure Strength investment, or one-part Dexterity to two-parts Intelligence. Again, Brigands get the short end of the stick, since their focus on Bleeding and Poison damage means they want to focus on Dexterity as much as possible- which means they get left with no wearable armour by Act IV.

* ComplacentGamingSyndrome: The game does its darnedest to avoid this, trying to design the game such that any build can be successful. However, players tend to gravitate towards a specific "efficient" builds for farming for loot.

* SugarWiki/FunnyMoments: Most of the [[https://titanquest.fandom.com/wiki/Letters Letters]], hilarious little EasterEgg items dropped by some hero monsters that paint a rather irreverant portrait of the game, from [[EmoTeen a mopey teenage Maenad's]] diary entry whining about how the hero she's crushing on doesn't seem to notice her, to various monsters writing letters home to their mothers, to a bizarre recipe for "Karkinos Bisque", to a complaint form submitted to the Underworld's "Grievances and complaints" division about a sword lodged in the belly that the author wishes removed ("Additional comments/concerns: Ouch").

* TooGoodToLast: After ''Iron Lore Entertainment'' folded, chances for a sequel were gone. ''[[WhatcouldHaveBeen Titan Quest 2]]'' would have dealt with others Titans threatening humanity. This trope is subverted a decade later with THQ Nordic's surprise support, including a new ''Ragnarök'' expansion pack.

*** Warlord Barmanu have [[MakeMeWannaShout a scream attack]] that cut off your health and stun you. And if that's wasn't enough, [[DeathFromAbove he can call an avalanche of icy rocks on your head]], stunlocking you for certain death.

** In the Hardcore Dungeons, you have to chose to either to continue forward in the dungeon, fight the end boss and get a better loot or leave now with a less rewarding loot. Sometime, one of gate leading to either path will already be lowered, meaning you can claim ''both loots''.

** In general, you level up very, ''very'' slowly by the standards of the genre; later in the game you can put in over an hour of hardcore monster slaying and questing and ''maybe'' gain a single level (slaying a major storyline boss or completing a story mission might give you EXP worth maybe 5-10% of your next level). Making matters worse, unlocking skills is gated by the requirement for you to sink your limited supply of skill points into upgrading your Mastery rank, and as the cost to the next tier increases the further you go, you can end up having to sink 3 entire (very slow) level-ups worth of skill points into it before you can even gain a single new skill, seriously slowing down build progression even further. This can make gameplay feel rather stagnant, as hours of gameplay go by without you being able to make any meaningful changes to your character's skill set. Notably, in the game's SpiritualSuccessor ''VideoGame/GrimDawn'' you level up much, ''much'' more quickly, and the skill point cost between mastery tiers doesn't rise nearly as fast, only requiring 5 points per tier until you get into the highest tiers of each skill tree.

** Items dropped by enemies or chests are 3D models affected by the physics engine, causing them to fall to the ground before settling, where they cannot be picked up until they stop moving. Occasionally an item can get caught on a loose polygon or something, which prevents it from settling properly for several seconds, forcing you to wait around until the physics engine finishes spazzing out and it stops moving. This is particularly noticeable with the Staff of Xanthippus quest item you need to retrieve to comple the "Xanthippus the Healer" sidequest on Knossos, which tends to get caught on the edge of the chest it's kept in.

** Items dropped by enemies or chests are 3D models affected by the physics engine, causing them to fall to the ground before settling, where they cannot be picked up until they stop moving. Occasionally an item can get caught on a loose polygon or something, which prevents it from settling properly for several seconds, forcing you to wait around until the physics engine finishes spazzing out and it stops moving.

* CriticalResearchFailure: The ''Eternal Embers'' DLC reveal that the current ruling Pharaoh is Tutankhamun. The problem is that you explored Rames' tomb in Act II, implying that Rames came before Tutankhamun. It's actually the other way around: Tutankhamun came first and Rames later.

** Without question, the Undead are the worst enemies in the game. The most common enemy type, appearing in all 4 acts and expansions, they're all completely immune to bleeding and vitality damage, almost completely immune to poison (80% fixed damage reduction), skeletons are resistant to piercing damage and ghosts are equally resistant to physical damage in general. This ''cripples'' the ability of several entire classes to deal with them in an even remotely effective manner- Rogue, Hunting, Spirit and to a lesser extent Dream masteries (if they focus too much on their vitality damage skilles) are all almost helpless (gods help the poor sucker Brigands[[note]]Rogue/Hunting class[[/note]]) and ghosts in particular give Warfare and Defense-focused characters conniptions. Act IV becomes a ''huge'' difficulty spike for non-elementalist characters because of the sudden hordes of Lost Souls you have to deal with that shrug off almost all your offence. It doesn't help that they have a tendancy to spring up out of the ground without warning, or that they come in gigantic hordes, and skeletons are among the fastest-moving melee enemies in the game. They'd almost qualify as DemonicSpiders if they weren't so common.

* OnlyTheCreatorDoesItRight: While the THQ Expansions and DLC have brought lot of [[AntiFrustrationFeatures qualities of life]] and additional new content, the general census from the fanbase is that they couldn't match Iron Lore's level of quality and polish.

** You can't enchant set items and unique items. This force you to continually farm for rare items called, monsters' infrequent items, which are especially useful in later difficulties.

** In general, you level up very, ''very'' slowly by the standards of the genre; later in the game you can put in over an hour of hardcore monster slaying and questing and ''maybe'' gain a single level (slaying a major storyline boss or completing a story mission might give you EXP worth maybe 5-10% of your next level). Making matters worse, unlocking skills is gated by the requiring you to sink your limited supply of skill points into upgrading your Mastery rank, and as the cost to the next tier increases the further you go, you can end up having to sink 3 entire (very slow) level-ups worth of skill points into it before you can even gain a single new skill, seriously slowing down build progression even further. This can make gameplay feel rather stagnant, as hours of gameplay go by without you being able to make any meaningful changes to your character's skill set. Notably, in the game's SpiritualSuccessor ''VideoGame/GrimDawn'' you level up much, ''much'' more quickly, and the skill point cost between mastery tiers doesn't rise nearly as fast, only requiring 5 points per tier until you get into the highest tiers of each skill tree.

** The ripple effects when walking on water. If you kill an enemy in it, any items it drops will actually cause a splash when they fall into it. And if you summon a [[LivingLava Core Dweller]] to accompany you and it follows you into water, its every foostep will ''send up gouts of steam.'' And this game was done in 2006!

** The Himalaya's mountains were awful to slug through because the snow was bleach white, causing a lot of strain to gamers' eyes. Fortunately, a later patch toned down the brightness of the snow, making the whole trek more tolerable.

** The Atlas Highlands beach. You know the developers are really pushing it when they mix [[GiantEnemyCrab giant crabs]], [[DemonicSpiders Harpy Sirens]] and a whole battalion of [[OurMermaidsAreDifferent merfolks]] (complete with witches, archers, lancers) as your welcome committee. With so [[ZergRush many monsters swarming you]], there's little room to maneuver without drawing even more critters to your feet.

** In general, you level up very, ''very'' slowly by the standards of the genre; later in the game you can put in over an hour of hardcore monster slaying and questing and ''maybe'' gain a single level (slaying a major storyline boss or completing a story mission might give you EXP worth maybe 5-10% of your next level). Making matters worse, unlocking skills is gated by the requiring you to sink your limited supply of skill points into upgrading your Mastery rank, and as the cost to the next tier increases the further you go, you can end up having to sink 3 entire (very slow) level-ups worth of skill points into it before you can even gain a single new skill, seriously slowing down build progression even further. This can make gameplay feel rather stagnant, as hours of gameplay go by without you being able to make any meaningful changes to your character's skill set.

** The Himalaya's mountains were awful to slug through because the snow was bleach white, causing a lot of strain to gamers' eyes. Fortunately, a later patch toned down the brightness of the snow making the whole trek more tolerable.

** The Himalaya's mountains were awful to slug through because the snow was bleach white, causing a lot of strain to gamers' eyes. Fortunately, a later patch toned down the brightness of the snow make the whole more tolerable.

* ThatOneLevel: Mimer's Maze in Act V is one hellish level. It's full of DemonicSpiders constructs with disabling effects, high damage resistance, and leech immunities.

** "Celtic Plaid" from ''Ragnarök'' is, on the surface, a very simple quest that only requires you to travel back to the first three regions of the base game (Greece, Egypt and Asia) to buy some cheap dye items for a Celtic weaver. Unfortunatly, what dyes the merchants carry are completely randomised- and if you aren't lucky, you can warp through every city in a region without finding a single merchant who sells it, forcing you to reload the game to reset all the merchants' inventories and try again. Possibly several times. This can be ''hellishly'' annoying [[RandomNumberGod if your luck is bad enough]]. Adding insult to injury, the reward isn't even worth the effort!

* TheyWastedAPerfectlyGoodCharacter: Near the end of the second expansion, you meet [[Myth/NorseMythology the three Norns]], but don't contribute anything to the game. You can interact with one, but she doesn't reveal anything useful, the second provides respec services and the third one just wander around doing nothing.

* ThatOneSidequest: Most sidequests in the game are somewhat short and to the point. However, one sidequest in the expansion ''Immortal Throne'' requires the player to find four gems, used to unlock the gate to a room full of goodies, free to be looted. The gems are rather easy to find, however they're very far apart (one is found ''right before the final boss'', while the sidequest is taken with about 3/4 of the expansion's campaign still left), which may severely confuse players who're doing it for the first time.