Games like Fat Baby
Games like Fat Baby include Garry's Mod, Goat Simulator, Totally Accurate Battle Simulator, Just Cause™ 3, and Brick Rigs. We matched them by the tags players give Fat Baby on Steam (Simulation, Sandbox, Exploration, Action, and Comedy): closest matches first, and among equally close ones the better-known games.

Garry's Mod
Shared: Sandbox · Multiplayer · Funny

Goat Simulator
Shared: Simulation · Sandbox · Comedy

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Funny

Just Cause™ 3
Shared: Action · Destruction · Sandbox

Brick Rigs
Shared: Sandbox · Destruction · Simulation

Fireworks Mania - An Explosive Simulator
Shared: Sandbox · Exploration · Multiplayer

BeamNG.drive
Shared: Simulation · Sandbox · Destruction

People Playground
Shared: Sandbox · Simulation · Destruction

Who's Your Daddy?!
Shared: Simulation · Funny · Comedy

LEGO® Worlds
Shared: Sandbox · Exploration · Multiplayer

Turbo Dismount™
Shared: Simulation · Funny · Destruction

Wreckfest
Shared: Simulation · Destruction · Action

Just Cause 2
Shared: Sandbox · Action · Multiplayer

Wobbly Life
Shared: Sandbox · Simulation · Multiplayer

Teardown
Shared: Sandbox · Destruction · Multiplayer

Slime Rancher
Shared: Exploration · Sandbox · Simulation

Gang Beasts
Shared: Action · Funny · Multiplayer

鬼谷八荒 Tale of Immortal
Shared: Simulation · Sandbox · Singleplayer

Fun with Ragdolls: The Game
Shared: Sandbox · Simulation · Action

SPORE™ Galactic Adventures
Shared: Simulation · Action · Exploration

Feed and Grow: Fish
Shared: Simulation · Action · Multiplayer

Human Fall Flat
Shared: Sandbox · Funny · Multiplayer

Space Engineers
Shared: Sandbox · Simulation · Multiplayer

House Flipper
Shared: Simulation · Sandbox · Multiplayer