Games like Citrus Rampage
Games like Citrus Rampage include ROUNDS, Stick Fight: The Game, Brawlhalla, Streets of Rage 4, and Broforce. We matched them by the tags players give Citrus Rampage on Steam (Arena Shooter, Side Scroller, Local Multiplayer, 2D Platformer, and Twin Stick Shooter): closest matches first, and among equally close ones the better-known games.

ROUNDS
Shared: Local Multiplayer · Action · 2D Fighter

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

Brawlhalla
Shared: 2D Platformer · Local Multiplayer · 2D Fighter

Streets of Rage 4
Shared: Action · 2D · Local Multiplayer

Broforce
Shared: Action · 2D · Side Scroller

Gang Beasts
Shared: Local Multiplayer · Action · PvP

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

Rivals of Aether II
Shared: Local Multiplayer · Action · 2D Fighter

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

Duck Game
Shared: Local Multiplayer · 2D · Action

20XX
Shared: 2D Platformer · Action · 2D

SpiderHeck
Shared: Local Multiplayer · 2D Fighter · PvP

Anomaly Agent
Shared: Side Scroller · 2D Platformer · 2D Fighter

TowerFall Ascension
Shared: Local Multiplayer · Action · 2D Fighter

Guns, Gore & Cannoli
Shared: Side Scroller · Action · 2D

Lost Castle
Shared: Side Scroller · PvP · 2D

GUILTY GEAR -STRIVE-
Shared: 2D Fighter · PvP · Local Multiplayer

DRAGON BALL FighterZ
Shared: Local Multiplayer · Action · 2D Fighter

Nidhogg
Shared: Local Multiplayer · 2D Fighter · Action

SpeedRunners
Shared: Local Multiplayer · Action · 2D

Your Only Move Is HUSTLE
Shared: Action · 2D Fighter · 2D

BattleBlock Theater®
Shared: 2D · Local Multiplayer · 2D Platformer

Street Fighter™ 6
Shared: 2D Fighter · Action · Local Multiplayer

Party Animals
Shared: Action · Local Multiplayer · PvP