Games like Rat Simulator
Games like Rat Simulator include Chinese Parents, Rock Simulator, Goat Simulator, Calm Down, Stalin, and Game Dev Tycoon. We matched them by the tags players give Rat Simulator on Steam (Simulation, Indie, Casual, Memes, and Psychological Horror): closest matches first, and among equally close ones the better-known games.

Chinese Parents
Shared: Simulation · Memes · Psychological Horror

Rock Simulator
Shared: Casual · Indie · Simulation

Goat Simulator
Shared: Simulation · Casual · Indie

Calm Down, Stalin
Shared: Indie · Casual · Memes

Game Dev Tycoon
Shared: Simulation · Indie · Casual

Emily is Away Too
Shared: Simulation · Indie · Casual

Russian Life Simulator
Shared: Simulation · Memes · Indie

FEMINAZI: The Triggering
Shared: Indie · Memes · Casual

Dictators:No Peace Countryballs
Shared: Simulation · Casual · Indie

Plague Inc: Evolved
Shared: Simulation · Indie · Casual

Mountain
Shared: Simulation · Indie · Casual

[Chillas Art] The Convenience Store
Shared: Indie · Simulation · Psychological Horror

Peace, Death!
Shared: Indie · Casual · Simulation

Passpartout: The Starving Artist
Shared: Simulation · Casual · Indie

Cookie Clicker
Shared: Casual · Indie · Memes

Rage Wars
Shared: Memes · Indie · Psychological Horror

Mini Motorways
Shared: Simulation · Casual · Indie

CUCKOLD SIMULATOR: Life as a Beta Male Cuck
Shared: Indie · Memes · Casual

Cockroach Simulator
Shared: Simulation · Indie · Psychological Horror

Hiveswap Friendsim
Shared: Indie · Simulation · Casual

Cat or Bread?
Shared: Indie · Casual · Psychological Horror

Papers, Please
Shared: Simulation · Indie · Casual

Mr.President!
Shared: Simulation · Memes · Indie

Golf With Your Friends
Shared: Casual · Indie · Simulation