Games like Splash
Games like Splash include Gang Beasts, Witch It, Timberman, Stick Fight: The Game, and Pikuniku. We matched them by the tags players give Splash on Steam (Action, Indie, Casual, and Multiplayer): closest matches first, and among equally close ones the better-known games.

Gang Beasts
Shared: Action · Multiplayer · Casual

Witch It
Shared: Multiplayer · Casual · Indie

Timberman
Shared: Casual · Indie · Action

Stick Fight: The Game
Shared: Multiplayer · Action · Casual

Pikuniku
Shared: Indie · Casual · Multiplayer

Overcooked! 2
Shared: Multiplayer · Casual · Indie

Tower Unite
Shared: Casual · Multiplayer · Indie

Golf With Your Friends
Shared: Casual · Multiplayer · Indie

How to Fish
Shared: Multiplayer · Indie · Action

ShellShock Live
Shared: Multiplayer · Action · Casual

Move or Die
Shared: Action · Multiplayer · Indie

SpeedRunners
Shared: Multiplayer · Indie · Action

Party Animals
Shared: Multiplayer · Casual · Action

Brawlhalla
Shared: Multiplayer · Casual · Action

Wobbly Life
Shared: Multiplayer · Action · Casual

Liars Bar
Shared: Casual · Multiplayer · Indie

Snakeybus
Shared: Indie · Action · Casual

Garry's Mod
Shared: Multiplayer · Casual · Action

Dead Bits
Shared: Action · Indie · Casual

Broforce
Shared: Action · Indie · Multiplayer

Dark Deception: Monsters & Mortals
Shared: Indie · Action · Multiplayer

WEBFISHING
Shared: Casual · Multiplayer · Indie

LOCKDOWN Protocol
Shared: Multiplayer · Action · Casual

Grand Theft Auto V Legacy
Shared: Action · Multiplayer