The original flash game has 'eat the banana' and then the protagonist spouts butterfly wings, fight the giant version of the Author Avatar (which takes form of a real photo of the author) and after defeating it, the protagonist blows up, and the words YOU WIN appeared, followed by congratulations and credits.

Freeze-Frame Bonus: In the launch trailer, there is one in form of a poster of Pedro saying 'KILL THEM ALL'.

Free-Fall Fight: In 2-9, you chase Denny by jumping in a long pit while you are falling you are shooting down other enemies.

Denny realizes that the vigilante is his brother, but doesn't say any more due to an inconvenient platform squishing him.

Denny's hatred of fathers may seem to be a gag to make his Bad Santa theme work, but it turns out that the previous boss, Mitch, is said father.

Foreshadowing: There's some clues of the vigilante and the bosses of the game are in fact connected.

Ear Ache: The blood on the area at one end of Pedro as shown on the page image drops the disturbing implication that the vigilante erased his memory by jamming a banana far into his ear.

Denser and Wackier: Compared to its Heroic Bloodshed ilk Hotline Miami, Katana ZERO, and RUINER.

Use bullet time to aim your shots while in the middle of parkour. Bullet Time: The main focus of the game.Bizarre and Improbable Ballistics: Ricocheting bullets always converge on a target, regardless of the angle of the object they bounce off of.The Atoner: The vigilante is revealed to be this, as he turns out to be a relative of the antagonists, and willingly gave himself amnesia in order to absolve himself of the guilt of killing them and to send a message to anyone who could follow in their footsteps after their deaths.

Anthropomorphic Food: Pedro, the title character.

An Ass-Kicking Christmas: District Null reveals the game takes place during Christmas time.

Tvtropes katana zero