Games like Fat Prisoner Simulator 2
Games like Fat Prisoner Simulator 2 include Goat Simulator, Gang Beasts, Garry's Mod, Totally Accurate Battle Simulator, and Wobbly Life. We matched them by the tags players give Fat Prisoner Simulator 2 on Steam (Indie, Casual, Action, Simulation, and Sports): closest matches first, and among equally close ones the better-known games.

Goat Simulator
Shared: Simulation · Funny · Casual

Gang Beasts
Shared: Action · Casual · Funny

Garry's Mod
Shared: Casual · Funny · Physics

Totally Accurate Battle Simulator
Shared: Simulation · Funny · Indie

Wobbly Life
Shared: Adventure · Simulation · Casual

Golf With Your Friends
Shared: Casual · Indie · Sports

Human Fall Flat
Shared: Funny · Adventure · Action

Superflight
Shared: Indie · Casual · Action

Turbo Dismount™
Shared: Simulation · Funny · Action

Session: Skate Sim
Shared: Simulation · Sports · Indie

I Am Bread
Shared: Simulation · Funny · Adventure

There Is No Game: Wrong Dimension
Shared: Indie · Adventure · Casual

Octodad: Dadliest Catch
Shared: Indie · Comedy · Funny

Mr.President!
Shared: Indie · Simulation · Action

Wreckfest
Shared: Simulation · Indie · Action

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

Donut County
Shared: Indie · Casual · Funny

Mount Your Friends
Shared: Indie · Funny · Sports

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

Surgeon Simulator
Shared: Simulation · Indie · Funny

Pikuniku
Shared: Indie · Casual · Adventure

Getting Over It with Bennett Foddy
Shared: Indie · Physics · Funny

Chained Together
Shared: Casual · Adventure · Simulation

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