Games like Monochromaniacs
Games like Monochromaniacs include Stick Fight: The Game, Brawlhalla, Rivals of Aether, One Finger Death Punch, and Streets of Rage 4. We matched them by the tags players give Monochromaniacs on Steam (Action, Indie, Casual, 2D, and 2D Fighter): closest matches first, and among equally close ones the better-known games.

Stick Fight: The Game
Shared: Action · Local Multiplayer · 2D Fighter

Brawlhalla
Shared: 2D Fighter · Casual · Local Multiplayer

Rivals of Aether
Shared: Indie · 2D Fighter · Local Multiplayer

One Finger Death Punch
Shared: Action · Indie · 2D Fighter

Streets of Rage 4
Shared: Action · Indie · 2D

Move or Die
Shared: Action · Local Multiplayer · 2D

SpeedRunners
Shared: Indie · Local Multiplayer · Action

Timberman
Shared: Casual · Indie · Action

TowerFall Ascension
Shared: Indie · Action · Local Multiplayer

Lethal League Blaze
Shared: Action · Indie · 2D Fighter

A Few Quick Matches
Shared: Indie · Casual · 2D Fighter

ROUNDS
Shared: Action · 2D Fighter · Local Multiplayer

Lethal League
Shared: Indie · Local Multiplayer · Action

One Finger Death Punch 2
Shared: Action · Indie · Casual

Broforce
Shared: Action · 2D · Indie

Awesomenauts
Shared: Action · 2D · Indie

Vampire Survivors
Shared: Indie · 2D · Casual

GUILTY GEAR XX ACCENT CORE PLUS R
Shared: Action · 2D Fighter · Great Soundtrack

Hotline Miami
Shared: Action · Indie · Great Soundtrack

Duck Game
Shared: Action · Local Multiplayer · 2D

GUILTY GEAR -STRIVE-
Shared: 2D Fighter · Great Soundtrack · Action

Tooth and Tail
Shared: Indie · Action · Casual

UFO 50
Shared: Indie · Action · 2D

Skullgirls 2nd Encore
Shared: Indie · 2D Fighter · Local Multiplayer