Games like Gumboy Tournament
Games like Gumboy Tournament include SpeedRunners, Chained Together, Drift86, Golf With Your Friends, and Brawlhalla. We matched them by the tags players give Gumboy Tournament on Steam (Indie, Casual, Racing, Multiplayer, and Platformer): closest matches first, and among equally close ones the better-known games.

SpeedRunners
Shared: Racing · Indie · Multiplayer

Chained Together
Shared: Casual · Platformer · Multiplayer

Drift86
Shared: Racing · Casual · Multiplayer

Golf With Your Friends
Shared: Casual · Multiplayer · Indie

Brawlhalla
Shared: Multiplayer · Casual · Platformer

Liars Bar
Shared: Casual · Multiplayer · Indie

Pikuniku
Shared: Indie · Casual · Multiplayer

Tower Unite
Shared: Casual · Multiplayer · Indie

WEBFISHING
Shared: Casual · Multiplayer · Indie

MECCHA CHAMELEON
Shared: Casual · Multiplayer · Indie

Witch It
Shared: Casual · Indie · Multiplayer

Retrowave
Shared: Indie · Racing · Casual

Town of Salem
Shared: Multiplayer · Indie · Casual

Ultimate Chicken Horse
Shared: Multiplayer · Platformer · Indie

Move or Die
Shared: Multiplayer · Indie · Casual

Overcooked! 2
Shared: Multiplayer · Casual · Indie

Timberman
Shared: Casual · Indie · Multiplayer

Barro
Shared: Indie · Racing · Multiplayer

Plague Inc: Evolved
Shared: Indie · Multiplayer · Casual

Need for Speed™ Unbound
Shared: Racing · Multiplayer · Casual

PICO PARK
Shared: Multiplayer · Casual · Platformer

How to Fish
Shared: Multiplayer · Indie · Casual

Garry's Mod
Shared: Multiplayer · Casual · Indie

Wreckfest
Shared: Racing · Multiplayer · Indie