These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Hotline Miami
Anticlimax Boss: Fighting the original hitman as the biker; he runs right at you, so all you have to do is whack him with your cleaver.
Broken Base: In Hotline Miami 2, there is a part where the main character rapes a woman although in reality it is just two actors creating a movie about the events of the first game. Reactions are what you'd expect.
Game Breaker: Big Balls, that is, throwing a dart at an enemy holding a gun. Kill everyone on the screen except one guy, get him to hold a gun with depleted ammo, get a dart, throw it at him repeatedly, and watch the points go up.
Hell Is That Noise: Any time the soundtrack hits a dissonant chord, which is often, but special mention goes out to the synthesizers on the tune that occurs at the intro to each mission.
Nausea Fuel: The sheer brutality of the violence, and the executions in particular, can have this effect. The game manages to avoid Crossing The Line Twice, making even the most desensitized gamer slightly disturbed at what they're doing to enemies (which fits in very well with the tone of the game).
Spiritual Licensee: The game owes a massive debt of influence to Drive, so much so that director Nicolas Winding Refn is specifically thanked in the credits. Accordingly, the two works share a retro 1980s-themed neon- and synth-heavy aesthetic (with Hotline actually being set in the 1980s); a mysterious, nameless protagonist who talks very little, if at all, and is known primarily by an instantly recognizable jacket; and graphic depictions of shockingly brutal violence (one of the game's finishing moves even looks very similar to the infamous head-stomping scene from Drive).
That One Level: The hospital. Not only is it a sudden unarmed stealth mission in the middle of a game as frantic as Hotline Miami, but it's also a massive Interface Screw too.
The following level, Assault, can qualify too. Loads of enemies, most of which have guns, very little opportunity to stealth through, and multiple big enemies.