History YMMV / EnterTheGungeon

* MagnificentBitch: Though at first glance a raging brute, [[BoxedCrook The Convict]] is much smarter than she lets on. In truth the cunning mob boss Laser Lily, she was arrested when her partner, the corrupt politician Blackstache, framed and arrested her. Convincing the Hegemony of man to let her brave the Gungeon instead of facing life in prison, she feigns the desire to erase her crimes from time. Fighting through the gungeon and besting the massive High Dragun, she obtains both the Bullet and Gun that can kill the past, being one of the first to survive facing the entire labyrinth of bullets. Going back in time, she acts on her true intention to erase her being arrested. Using her second chance to gun down Blachstache and his police army, she ends the game a free woman relaxing on the beach.

** [[spoiler:The Resourceful Rat is possibly the hardest opponent of the game, close to [[FinalBoss The Lich.]] Phase 1 involves very, very fast knife projectiles that outspeed every other boss attack in the game, and are fired in extremely wide spreads. The rat also tends to throw the knives after his bigger, flashier attacks, catching players off guard. Phase 2 involves [[Franchise/MetalGear a giant mech suit]] that seems to fire storms of bullets in no real pattern, and summons massive swarms of Spent. Phase 3 completely flips the gameplay, ''becoming a glorified game of Punch-Out''. Thankfully, he isn't very picky about how you can avoid his attacks, but his tailspin will wipe you out if you don't block it. Also, if you're playing multiplayer and think you have an extra person to fall back on if you're defeated during Phase 3, nope! The Rat [[CutscenePowerToTheMax captures the Cultist offscreen]]. And finally, the Resourceful Rat won't drop anything of real value if you don't use certain attacks at certain times during the Punch-Out phase. It makes for an ''aggravating'' boss, but oh so cathartic to finally defeat.]]

* MagnicfentBitch: Though at first glance a raging brute, [[BoxedCrook The Convict]] is much smarter than she lets on. In truth the cunning mob boss Laser Lily, she was arrested when her partner, the corrupt politician Blackstache, framed and arrested her. Convincing the Hegemony of man to let her brave the Gungeon instead of facing life in prison, she feigns the desire to erase her crimes from time. Fighting through the gungeon and besting the massive High Dragun, she obtains both the Bullet and Gun that can kill the past, being one of the first to survive facing the entire labyrinth of bullets. Going back in time, she acts on her true intention to erase her being arrested. Using her second chance to gun down Blachstache and his police army, she ends the game a free woman relaxing on the beach.

* TheyWastedAPerfectlyGoodPlot: Some fans are baffled as to why the R&G Depot was added to the game, as it contributes very little (if anything at all) to the lore, and doesn't offer any rewards or important items for going through it. It only seems to exist for the sake of a [[spoiler:''VideoGame/MetalGearSolid'']] reference and giving use to some otherwise scrapped enemies.

*** Unlocking the third elevator takes the cake here. Since armors takes damage before hearts, having 3 on hand encourages searching for them and doing a NoDamageRun. Playing as the Robot, who starts with 6 armor instead of health, does little to circumvent this since the required amount of armor is raised to 6.
** Accessing Abbey of the True Gun. After finishing Oubliette, you need to carry a special piece of armor, which will always be consumed before the rest of the health bar, all the way to an altar in the next level. This means, like unlocking the third elevator, a NoDamageRun is mandatory.

*** Unlocking the third elevator takes the cake here. Since armors takes damage before hearts, having 3 on hand encourages searching for them and doing a NoDamageRun. Using the Robot, who starts with 6 armor instead of health, is not much better, is increased to 6.

** Unlocking the shortcut to each chamber. To elaborate, first you'll need to get a certain amount of a certain item (3 blanks, 3 armor, 4 junk, and 6 full heart containers for the second, third, fourth, and fifth chambers, respectively), a whole lot of coins and keys (3 keys and 120 coins, 4 keys and 180 coins, 5 keys and 240 coins, and 6 keys and 300 coins for the second, third, fourth, and fifth chambers, respectively), some Hegemony credits (10, 15, 20, and 25 for the second, third, fourth, and fifth chambers, respectively), and last but not least, the master round from the previous chamber. Needless to say, it can take a long time to get them all, especially if the game is stingy with item drops and you're not good at beating the bosses without taking a hit. The most notable part about what makes these quests so difficult is there's no way to do them incrementally; you can't just deposit all the coins you have on hand and build up to 300 over multiple runs, you need to have that rather large amount of cash on hand (and thus not spent all run). And for the same reason, having one or two armor pieces is doable, gaining 3 can be tricky, but actually having 3 on hand means gathering armor while NOT BEING HIT[[note]]If you think of getting it easy with the Robot, who starts with 6 armor instead of health, that number is increased to 6[[/note]].

** Leaving your items behind (excluding keys and hearts) will always result in the Resourceful Rat attempting to steal them, and if he succeeds, he leaves behind a mocking note as salt to the wound. This effectively brings resource management to a complete halt, as you're forced to either take the item where it stands or leave it to the Resourceful Rat's mercy. As a result, many players have a burning desire to somehow remove him from the game, if only temporarily.[[note]]Originally there ''was'' a way to stop him, as he had a DummiedOut boss fight. As of Gungeons & Draguns, you ''can'' fight him, though he is a fairly brutal BonusBoss, and defeating him doesn't prevent him from stealing items on future runs.[[/note]]

** While just a miniboss, fighting Fuselier without any form of flying is an exercise in frustration. The arena resticts you to a narrow strip of floor, all the while forced to dodge his attacks. Your movement will be further restricted by the occasional lines of fire, alongside the wind-up bullets he unleashes. Combined with a surprising amount of health for a miniboss, Fuselier will drain your resources with every encounter.

*** Oh, and as of the Advanced Gungeons & Draguns update? Completing certain requirements leads to the Dragun [[VictoryFakeout faking you out]] and gaining a ''third phase'', as well as refilling its health bar, [[TurnsRed turning]] [[GoldColoredSuperiority gold]], and using some brand new attacks, [[MarathonBoss all whilst you're still tired out from the first phase]].

** Many of the bosses from the characters' pasts are generally pushovers to compensate for the fact that you are likely worn out from adventuring all the way through the Gungeon and [[{{Permadeath}} you cannot retry if you lose to them.]] The [[spoiler:Pilot's]] past boss fight, [[spoiler:the HMS Absolution,]] is pretty tough, but it's nothing in comparison to [[spoiler:the Bullet's past ''bosses.'' Yep, there are ''two'' of them, and you have to fight through ''both'' using only a downgraded version of your starting sword that ''cannot shoot sword beams.'' You heard that right — these bosses are ''[[UnexpectedGameplayChange melee only]]'' in the style of ''[[TheLegendOfZeldaALinkToThePast A Link to the Past]]'', in a game where literally no other bosses stick you with this rule.]]

* ThatOneSidequest: Unlocking the shortcut to each chamber. To elaborate, first you'll need to get a certain amount of a certain item (3 blanks, 3 armor, 4 junk, and 6 full heart containers for the second, third, fourth, and fifth chambers, respectively), a whole lot of coins and keys (3 keys and 120 coins, 4 keys and 180 coins, 5 keys and 240 coins, and 6 keys and 300 coins for the second, third, fourth, and fifth chambers, respectively), some Hegemony credits (10, 15, 20, and 25 for the second, third, fourth, and fifth chambers, respectively), and last but not least, the master round from the previous chamber. Needless to say, it can take a long time to get them all, especially if the game is stingy with item drops and you're not good at beating the bosses without taking a hit. The most notable part about what makes these quests so difficult is there's no way to do them incrementally; you can't just deposit all the coins you have on hand and build up to 300 over multiple runs, you need to have that rather large amount of cash on hand (and thus not spent all run). And for the same reason, having one or two armor pieces is doable, gaining 3 can be tricky, but actually having 3 on hand means gathering armor while NOT BEING HIT[[note]]If you think of getting it easy with the Robot, who starts with 6 armor instead of health, that number is increased to 6[[/note]].

** [[spoiler:Bullet Hell]] is chock-full of these, but even among the others, the Shotgrub stands out in particular. It shoots several rounds of cluster bullets in a shotgun pattern, which split upon striking a wall and disperse in waving, erratic patterns. The combination of ricochets coming from multiple directions (often from offscreen), unpredictable bullet movement, and unlimited range make these particularly deadly in a chamber where you are already being swarmed by incoming bullets.

* TheyWastedAPerfectlyGoodPlot: Some fans are baffled as to why the R&G Depot was added to the game, as it contributes very little (if anything at all) to the lore, and doesn't offer any rewards or important items for going through it. It only seems to exist for the sake of a [[spoiler:''VideoGame/MetalGearSolid'']] reference.