Games like FATPETS
Games like FATPETS include Peggle Deluxe, Vampire Survivors, Defy Gravity Extended, Timberman, and LIMBO. We matched them by the tags players give FATPETS on Steam (Casual, Puzzle, Arcade, Pixel Graphics, and Cartoony): closest matches first, and among equally close ones the better-known games.

Peggle Deluxe
Shared: Casual · Puzzle · Arcade

Vampire Survivors
Shared: Pixel Graphics · Casual · 2D

Defy Gravity Extended
Shared: Puzzle · Puzzle Platformer · Casual

Timberman
Shared: Casual · Pixel Graphics · Action

LIMBO
Shared: Puzzle · Puzzle Platformer · 2D

FEZ
Shared: Puzzle · Pixel Graphics · Casual

Zup!
Shared: Casual · Puzzle · 2D

pureya
Shared: Casual · Arcade · 2D

Broforce
Shared: Pixel Graphics · Action · 2D

Portal 2
Shared: Puzzle · Singleplayer · Platformer

Zuma's Revenge!
Shared: Casual · Puzzle · Action

Zup! S
Shared: Casual · Puzzle · 2D

Zup! 2
Shared: Casual · Puzzle · 2D

There Is No Game: Wrong Dimension
Shared: Puzzle · Pixel Graphics · Casual

Out There Somewhere
Shared: Puzzle · Pixel Graphics · 2D

Webbed
Shared: Pixel Graphics · Puzzle Platformer · 2D

Zup! 4
Shared: Casual · Puzzle · 2D

Zup! 8
Shared: Casual · Puzzle · 2D

Toki Tori
Shared: Puzzle · Casual · 2D

Zuma Deluxe
Shared: Puzzle · Arcade · Casual

Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad
Shared: Arcade · Casual · 2D

Skul: The Hero Slayer
Shared: Pixel Graphics · Action · 2D

Zup! 3
Shared: Casual · Puzzle · 2D

Gunpoint
Shared: Puzzle · Pixel Graphics · 2D