Games like A Sound Plan
Games like A Sound Plan include Broforce, Brawlhalla, Rivals of Aether, Stick Fight: The Game, and TowerFall Ascension. We matched them by the tags players give A Sound Plan on Steam (Local Multiplayer, Indie, 2D Fighter, Action, and Local Co-Op): closest matches first, and among equally close ones the better-known games.

Broforce
Shared: Action · Pixel Graphics · Local Co-Op

Brawlhalla
Shared: 2D Fighter · Local Multiplayer · Multiplayer

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

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

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

Nidhogg
Shared: Local Multiplayer · 2D Fighter · Pixel Graphics

Duck Game
Shared: Local Multiplayer · Action · Pixel Graphics

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

Lethal League
Shared: Local Multiplayer · Indie · 2D Fighter

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

Timberman
Shared: Indie · Pixel Graphics · Action

ROUNDS
Shared: Local Multiplayer · 2D Fighter · Action

TEKKEN 7
Shared: Action · Local Multiplayer · Arcade

SpeedRunners
Shared: Local Multiplayer · Indie · Action

Streets of Rage 4
Shared: Indie · Action · Local Multiplayer

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

Ultra Street Fighter® IV
Shared: Local Multiplayer · 2D Fighter · Action

Overcooked
Shared: Indie · Local Co-Op · Local Multiplayer

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

Overcooked! 2
Shared: Local Co-Op · Local Multiplayer · Indie

Gang Beasts
Shared: Local Multiplayer · Action · Indie

Vampire Survivors
Shared: Indie · Pixel Graphics · Action

Move or Die
Shared: Local Multiplayer · Action · Indie

Enter the Gungeon
Shared: Indie · Pixel Graphics · Local Co-Op