Games like Soulbound
Games like Soulbound include SpeedRunners, Super Meat Boy, Ultimate Chicken Horse, Downwell, and Celeste. We matched them by the tags players give Soulbound on Steam (Party Game, Racing, Precision Platformer, Fast-Paced, and Side Scroller): closest matches first, and among equally close ones the better-known games.

SpeedRunners
Shared: Racing · Fast-Paced · Platformer

Super Meat Boy
Shared: Precision Platformer · 2D Platformer · Platformer

Ultimate Chicken Horse
Shared: Party Game · Platformer · PvP

Downwell
Shared: Precision Platformer · 2D Platformer · Platformer

Celeste
Shared: Precision Platformer · 2D Platformer · Platformer

Move or Die
Shared: Fast-Paced · 2D · Casual

Broforce
Shared: Platformer · Side Scroller · 2D

Pizza Tower
Shared: Fast-Paced · 2D Platformer · Platformer

Sonic Mania
Shared: Fast-Paced · Platformer · 2D

Katana ZERO
Shared: 2D Platformer · Platformer · Fast-Paced

Draw & Guess
Shared: Party Game · Casual · PvP

Geometry Dash
Shared: Precision Platformer · 2D · Platformer

Thomas Was Alone
Shared: Side Scroller · Precision Platformer · 2D Platformer

Party Animals
Shared: Party Game · Casual · PvP

Remnants of Naezith
Shared: Precision Platformer · Racing · Fast-Paced

Duck Game
Shared: Fast-Paced · Platformer · 2D

Gang Beasts
Shared: Party Game · Casual · Action

Rocket League®
Shared: Racing · Fast-Paced · Multiplayer

Sonic Superstars
Shared: 2D Platformer · Platformer · Casual

Timberman
Shared: Casual · Indie · 2D

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

VVVVVV
Shared: Precision Platformer · 2D Platformer · Platformer

Gravity Circuit
Shared: Platformer · 2D Platformer · Fast-Paced

SANABI
Shared: 2D Platformer · Action · 2D