In most games, fighting enemies comes down to two phases. A) Fighting through waves of normal mooks and baddies and making your way through levels, and B) fighting boss villains. Of course, a boss is supposed to be a tougher challenge than a normal mook, but they are also a singular enemy (or at least a small amount), and bosses usually test the player's current ability instead of becoming a tyrannical wave of destruction (at least not [[ThatOneBoss most of the time]]).

In some cases, though, the two stages of play have different levels of difficulty. Sometimes the boss fights will be infuriatingly hard, at least compared to normal play, forcing the player to [[WakeUpCallBoss really get into gear]] (and creating the impression that the game is just little easy segments in between bosses). Other times, bosses seem easy (sometimes [[BreatherBoss ridiculously so]]), but the main levels [[NintendoHard make you cry]].

If you find a game like this, congratulations, you've encountered Boss Dissonance.

'''A SuperTrope to EasyLevelsHardBosses; HardLevelsEasyBosses.''' If a game is one or the other, place it there.

Compare SNKBoss, BossGame, MooksButNoBosses.
!!Examples that don't fit in the {{sub trope}}s:

* ''VideoGame/CastlevaniaLamentOfInnocence'' varies depending on the character you use. With Leon Belmont's defensive abilities and special weapons, levels can be quite challenging, especially when you have to engage in any platforming due to CameraScrew, but the bosses are easy once you learn their pattern (yes, even [[ThatOneBoss Death]]). With bonus character Joachim Armster, it's the opposite - his attacks blaze through regular enemies, most of the platforming challenges are removed (since he has no whip swing), but because he can't block or use healing items, the bosses are ''insanely hard''. The worst is [[BonusBoss the Forgotten One]], who is hard enough for Leon to beat, and nigh impossible for Joachim to beat. While the Orb it drops acts as Leon's InfinityPlusOneSword, for Joachim the Orb does nothing at all.
* ''VideoGame/TheLegendOfZeldaSkywardSword'' [[ZigzaggedTrope zig-zags between the two extremes]] during the first half. On the one hand, you have the easy Skyview Temple followed by [[ThatOneBoss That One]] WakeUpCallBoss Ghirahim, and on the other, the much more difficult Earth Temple and Lanayru Mining Facility having very easy bosses. There's also, of course, the fairly difficult first battle against The Imprisoned ''outside'' a dungeon. A DownplayedTrope in later dungeons, however: Notwithstanding Tentalus, the other bosses are generally on par with their levels of residence difficulty-wise. In fact, it's after the first half of the game when overworld bosses battles appear, further blurring the difficulty curve.
* The first ''VideoGame/{{Splatterhouse}}'' game has only two examples:
** The fifth boss, Mutant Jennifer, is a pain in the ass compared to her long but somewhat easy stage... that is, if you avoid taking the path to the necromancer midboss.
** The very short sixth stage, being the most annoying stage in the game because of those evil, constantly-spawning life-sucking fetus monsters, has a fairly easy boss right at the end. All you had to do is keep hitting it, killing the bubbles that form around it in the process. Of course, the hard part is dealing with the bubbles that drop from the ceiling.
* The bosses in ''VideoGame/GodHand'' actually aren't that hard (Exception to Azel), all of them having easily abused patterns. Now the regular levels, on the other hand...
* The levels of the the ''VideoGame/NoMoreHeroes'' series are all rather easy with very basic enemies, with occasional issues with mass gunfire. The boss battles were the obvious focus, where all the work was put in, although it varies from boss to boss.

* ''{{VideoGame/Diablo}} 2'' does both kinds. Act 1 and 2 have bosses that can chew you up in the matter of seconds if you blink. Especially [[ThatOneBoss Duriel]], who's not only super tough and super fast, but you must also [[BossRoom fight him in a small chamber that doesn't even leave any room for strategy]], so if you're playing a ranged character, you can kiss him goodbye. In Acts 3, 4, and 5, the EliteMooks and their [[BossInMooksClothing leaders]] that you need to fight before facing the boss are MUCH harder than their infernal masters. Mainly because when facing the boss, all you really need to do is dodge. In hell difficulty, act bosses and superuniques without minions are usually much easier than normal uniques and their minions since act bosses don't get extra boss modifiers and immunities.

* ''VideoGame/AtlanticaOnline's'' many dungeons have an odd version of both types. In order to complete a dungeon, each level must be cleared of enemies, including mooks and a boss, and usually a couple of minibosses.
** It is level-focused in that if you fail to kill all enemies on a floor within an allotted time, you fail the dungeon. Also, nearly all enemies will group together in 3s, and most are much stronger than their level indicates.
** The boss difficulty kicks in around the last few battles involving the boss and minibosses. They have the HP equivalent of over a dozen mooks, often cast spells that damage/debilitate all your mercenaries, and to top it off, have a wall of mooks in front of them and as support.
** Oh and the Nation dungeons also throw EscortMission aspects into the mix.
* ''VideoGame/CityOfHeroes'' has examples of both kinds. For example, the Imperious Task Force is rather easy the entire way until fighting Romulus at the end, in which many a team has grinded to a halt while they figure out how to use their skills to defeat him. On the other hand, the Elite Bosses in the Lady Grey Task Force (especially the weakened Hamidon encountered in the 2nd to last mission) are considered to be more annoying battles than the rather straight forward Archvillains who are supposed to outrank them.
* ''VideoGame/SpiralKnights'' has both kinds in the form of the second-tier bosses. The Royal Jelly Palace a clear boss-focused level, being fairly easy followed by a deeply difficult DamageSpongeBoss that can be a huge pain to deal with, since it regenerates health constantly. On the 'difficult levels' side, the Ironclaw Munitions Factory is absolutely full of traps and high-damage rockets, killing you if your mind wanders for a mere moment, but the Roarmulus Twins at the end are a breeze if at least one person in the party knows the fight.
* ''VideoGame/WorldOfWarcraft'' has seen both extremes and everything inbetween over its long existences in various shapes and forms.

* ''VideoGame/TheLegendOfSpyro: The Eternal Night'' has some killer boss battles and regularly throws regular-and-above-regular enemies at you right in the MIDDLE of difficult fights. One example of this being the final stage of the battle against Skabb the pirate, seen [[ here]].
* The ''VideoGame/MegaManClassic'' series varies widely:
** Those goddamn disappearing blocks...and SpikesOfDoom...and BulletHell...
** [[MemeticMutation You can't beat]] [[MemeticBadass Air Man.]]
** In ''VideoGame/MegaMan2'' the fandom is split between which is the pushover and which is the utter meatgrinder: [[ThatOneBoss Quick Man]][[note]]veterans, who tend to relish in self-imposed challenges like no-damage runs, are nailed to the wall trying to decipher his AI pattern; newcomers inevitably tackle Quick Man last and just bull rush him whilst loaded up with Flash Stopper and E Tanks[[/note]], [[ThatOneLevel or his stage]][[note]]newcomers are helplessly shredded by his barrage of instant death lasers, while veterans pretty much know the stage by heart[[/note]].
** In general, using a robot master's weakness on him makes the battle easier, although the amount the difficulty is lowered depends on the boss and the weapon.
** Doc Robot from ''VideoGame/MegaMan3'' not only has souped up and harder versions of certain Robot Master's stages, but you have to fight him 8 times (2 per level) and he takes the powers of the Robot Masters from ''2''. Spark Man's stage is easy, but fighting a faster, larger version of Quick Man (already ThatOneBoss in the previous game) is not!
** Burst Man's stage is a leisurely swim, followed by a boss that will slam you straight into the instant-kill ceiling of his room.
** The ''VideoGame/MegaManZero'' series is focused on difficult bosses, generally. Stages are SLIGHTLY easier than the boss you have to face off against.
** Fan games are almost universally boss-focused, perhaps because creators are willing to put work into their robot masters but treat the regular enemies as the sprite rips they are.
** ''VideoGame/MegaManAndBass'' deserves special mention: the game is boss-focused if you choose Bass and a level-focused if you choose Mega Man, despite the maps and the bosses being all but exactly alike. Bass is more agile with a rapid fire multi angle buster great for dealing with mooks making him the best choice for levels, but he can't charge it like Mega Man can and bosses get mercy invincibility so rapid fire is largely ineffective against them.
** Successfully maneuvering the stages in ''VideoGame/MegaManX6'' is a considerably more challenging task than winning the boss fights.
** ''VideoGame/MegaManX8'' is more or less boss-focused - every boss even gets to turn invincible at some point and fire a tricky DesperationAttack. On the other hand, it gave us not one but two Ride Chaser stages...
** ''VideoGame/MegaMan5'' has both extremes: the stage from hell with an easy boss (such as Gyro Man) or the easiest stage you've ever seen with the boss from hell (such as Gravity Man).
** ''VideoGame/MegaManZX Advent'' has the Floating Ruins which are relatively easy if you have Queenbee and Vulturon, but then you have to fight [[BlowYouAway Aeolus]] and his [[ShockAndAwe stupid lightning spinners]].
* ''VideoGame/LegendOfKay'' has boss battles that are a relief compared to the evil stage difficulty. You will often find yourself overrun with mooks, all with different weaknesses which makes the situation a clusterfuck. The exception is the second form of the final boss who is an example of unfair difficulty, as the only way to dodge his combo is to use the Breakable Jongs on the outside of the arena to keep away. Each jong can only be destroyed by one weapon type and the types aren't in a logical order E.G. Sword, Claws, Hammer. So you can't just press the cycle button once per jong; you often end up whacking futilely against one with the wrong weapon and falling into the lava.
* In ''VideoGame/MickeyMousecapade'', the shortest level in the game, the Pirate Ship, houses ThatOneBoss, Peg Leg Pete (Captain Hook in the Japanese version).
* VideoGame/{{KidKool}} has levels that have [[FakeDifficulty blind jumps, water-hopping, fans that blow you around, cheap deaths, and awful controls]]. The bosses are much too easy.

* ''VideoGame/{{Blur}}'' is a weaponised racing game featuring several boss races. Each boss race is competitive until you pick up your first weapon and blow the boss off the road, usually putting him so far behind that there is no way you can possibly lose unless you are extremely bad at the game.

* ''VideoGame/ZombiePanicInWonderland'' manages to hit BOTH kinds of dissonance on the same game. The first world is what you'd expect (i.e.: Easy), but the boss is ThatOneBoss, with [[TurnsRed attack patterns that change as his health goes down]] and hard-to-dodge moves. The other two worlds are notably harder, but their bosses are really easy, with their predictable, non-changing patterns and dodgeable attacks. Clearly the dev team took more time to make the first boss than the other two combined.

[[AC: RolePlayingGame]]
* ''VideoGame/DeusExHumanRevolution'' manages to have both types simultaneously. It just depends on how you actually approach the fight. All of the bosses are trivial if you know which weapons they are vulnerable to. For example, the first boss can easily be eliminated by [[spoiler:throwing the barrels of poison gas lying around or spamming him with the Stun Gun]]. The [[spoiler:Typhoon augmentation]] also pretty much serves as a GameBreaker for three of the fights. However, this is potentially a very stealth heavy game, some of the most effective weapons against them are not the most obvious choices, for example, the [[spoiler:Combat Rifle]] is pretty awful compared to most other weapons for the boss. It's entirely possible to walk into the third boss with little ammo, ineffective weapons, and if you make a certain story decision [[spoiler:being unable to use any augments and having an InterfaceScrew on top of that]]. So, if you go into the bosses prepared properly, they are trivially easy, but if you are not properly prepared (which might be likely due to WrongGenreSavvy and assuming very effective anti-boss weapons are useless since they would be in most games) then they are far more difficult than the rest of the game.
* ''DragonQuestIX'''s [[BonusDungeon grotto system]] can go both ways, since the grottoes (twisted labyrinths filled with monsters and one out of twelve possible bosses) are randomly generated depending on various parameters like the main character's current level, the grotto previously beaten, etc. However, which boss is present is determined separately, so it's entirely possible to go through a dozen hellish floors containing the worst DemonicSpiders ever created by the mind of developpers, and the boss a relaxing exercise in CherryTapping without fear of retribution. And vice versa.

* Almost any ''VideoGame/FireEmblem'' level where the boss doesn't move.
** Most of the time, the boss is effectively a regular enemy at a high level with better weapons, and it's fairly easy to surround them and wear them down. It's even easier when they have no ranged attacks, allowing you to pick them off at no risk. On the other hand, the regular enemies in the game tend to be cannon fodder, while the boss is usually stronger than all the regular enemies in a level combined. Bosses that can actually move are extremely dangerous.
** ''Thracia 776'' comes to mind, considering how anticlimactic Beldo is once you get to him. The game is easily the hardest in the series in many fans' eyes.
* ''VideoGame/SuperRobotWars'' does this occasionally. The difficulty of a boss isn't necessarily determined by the amount of HitPoints or statistics they have, but primarily by their unit abilities and whether or not they can successfully CounterAttack. As a result, fighting such a boss will invariably lead to the next one being an AnticlimaxBoss and/or BreatherBoss. This leads to some interesting instances, such as the case in ''[[VideoGame/SuperRobotWarsAlpha Super Robot Wars Alpha Gaiden]]''. The penultimate boss is harder than the FinalBoss, despite being weaker than the latter simply because the FinalBoss has very limited ammunition for its attacks.
** ''VideoGame/SuperRobotWarsOriginalGeneration'' uses this as much as possible, though given its DynamicDifficulty, this trope is more or less invoked to give players a reprieve of a particularly hard, but potentially, [[MarathonLevel long]] scenario.
*** In the first game, if players chose [[Characters/SuperRobotWarsAlpha Ryusei Date]] as the protagonist, they'll have to fight [[spoiler:[[Characters/SuperRobotWarsAlpha Ingram Prisken and the R-Gun Rivale]]]], which comes with [[GradualRegeneration HP/EN regeneration]], [[DeflectorShield a "Warp Field" barrier that reduces damage by half]] and minimal areas on the map allowing HP/EN regeneration for allied units. The next scenario features a FlunkyBoss, with the map containing an HP/EN recovery field. Sure, the boss is standing on it with its own "Warp Field" ability, but clearing the area of the flunkies and surrounding the boss while standing on the field eases up difficulty. If allied characters have the "[[MinmaxersDelight SP Regeneration]]" pilot skill by that point in the game, the battle is rendered much easier.
*** In ''Original Generation Gaiden'', the FinalBoss [[spoiler:[[Characters/CompatiHeroSeries Dark Brain]]]] has hundreds of thousands of HP, [[OneWingedAngel an additional form]], can regenerate a third of its HP each turn and can deal a OneHitKill on allied units, even if they're properly upgraded. It is considered [[ThatOneBoss the hardest boss]] in [=SRW=] history, yet the TrueFinalBoss [[spoiler:[[Characters/MasouKishin Shu Shirakawa with the Neo Granzon]]]] is a cakewalk, as it has fewer HP, weaker attacks and less HP regeneration compared to the former.
*** [[Characters/SuperRobotWarsDestiny Perfectio]] in the ''Second Original Generation'' regenerates HP to full ''twice'' in the same scenario (due to in-game events), to which the entire scenario featuring it is a MarathonLevel, with no break in-between two previous bosses. Perfectio's unit also comes with [[ExtraTurn the ability to perform two actions per turn]] and a high EN pool, making it futile to burn away the EN in hopes to prevent it from counterattacking. However, the next scenario is generally easier, despite it being a DualBoss, because neither have Perfectio's unit abilities nor its event-driven, RegeneratingHealth situation. Additionally, if the player achieves the "Hard" route split leading to this scenario, they gain the EleventhHourRanger in the middle of the battle.

* ''VideoGame/RockBand'' has some songs that don't fit where it sorts them when sorting by difficulty.
** On the first one, "Don't Fear The Reaper" appears towards the middle of the songlist for Drummers (there's TWO sections that will kill untrained and trained ones alike, even if the drummers in question can clear [[HarderThanHard Impossible]] charts). DLC, however, is where this problem is especially evident, as "I.V." (part of the 20 Free songs for ''VideoGame/RockBand 2'' owners) is slotted as a 4/7 (3 dots) [[FakeDifficulty despite numerous]] ''[[FakeDifficulty charted]]'' [[FakeDifficulty double-kicks on the drum chart.]]
** Even more infamous are some of the guitar parts. "Constant Motion" in particular is a 6/7, which looks fairly accurate until you hit the guitar solo, which is widely considered to be one of the most difficult (if not ''the'' most difficult) one in the entire game, including the 1000+ DLC songs.
** It seems Harmonix ranks songs based on their overall difficulty, rather than their peak. This leads to songs such as [[Music/AvengedSevenfold Afterlife]] being rated a measly 5/7 on guitar, in spite of sections [[ like this.]]

* ''VideoGame/PokemonDiamondAndPearl'': With the exception of Flint's slightly diverse team the Elite Four are actually very predictable and easy to beat so long as ElementalRockPaperScissors is taken into account, but the Champion the player faces after defeating them has a team of the strongest Pokemon in the region with diverse movesets, one of which is both so strong it is banned from competitive play and literally the strongest that a Pokemon of its species could possibly be.
* ''VideoGame/{{Xenogears}}'' gives up entirely on random encounters halfway through and only offers boss battles (although the overworld and previous areas are still accessible should you want to level up). This is due to budget cuts that left the game incomplete.
* ''VideoGame/SagaFrontier'' is a rare case that can play this one both ways, due to the way the "Battle Rank" system works. Which monsters you run into in a fight are scaled up or down based on how many battles you've done, as well as where you train- Depending on the location, the enemies you fight may be much stronger or weaker than what is "level appropriate". Bosses are set at +2 BR and scale up at different points, so it's entirely possible to go rush headlong into a boss fight you're unprepared for, even though you're capable of slaughtering everything else in the region.
* ''VideoGame/Persona3'' swings like a weathervane in a tornado. On the one hand, Tartarus is [[StealthPun Hell]] to go through, stuffed to the gills with DemonicSpiders, and if you can handle Tartarus, you will not have any trouble whatever with the Full Moon bosses. On the other hand, the Tartarus bosses? They're nearly all ThatOneBoss, designed as [[BeefGate Beef Gates]] par excellence, and only get harder as you climb the tower - and LevelGrinding won't help you. And then just when you think that's the rule, there's the FinalBoss... who is a Full Moon boss, fought in Tartarus. And it is ThatOneBoss to end all [[ThatOneBoss Those One Bosses]] (unless you have [[GameBreaker Armageddon]]). [[NintendoHard It's a Megaten game.]]
* ''VideoGame/TwoWorlds'' featured this due to its item combining mechanic. Duplicate weapons could be squashed together into one weapon with better stats, so those mid-level swords you find dozens of are really all pieces of the InfinityPlusOneSword. If you've done any side quests at all on your way to the boss (and it's pretty hard to avoid detouring through the gorgeous countryside), you'll probably kill the final boss in two hits. TheDragon right before the boss? Not so much.

[[AC: Shooter]]
* The WebGame [[ Zombo Buster Rising]] has rather easy levels as long as you grind for money and upgrade your characters. The boss on the other hand is ThatOneBoss who is simultaneously a DamageSpongeBoss, a FlunkyBoss, and a TimeLimitBoss (with a form of BossArenaUrgency) who will ''destroy'' you if his [[LuckBasedMission random AI]] spawns waves too often or moves forwards often, even if you have upgraded everything.