Games like Casual Desktop Game
Games like Casual Desktop Game include Garry's Mod, People Playground, Retrowave, Goat Simulator, and Razortron 2000. We matched them by the tags players give Casual Desktop Game on Steam (Casual, Sandbox, Moddable, Nostalgia, and Retro): closest matches first, and among equally close ones the better-known games.

Garry's Mod
Shared: Sandbox · Moddable · Casual

People Playground
Shared: Sandbox · Moddable · Casual

Retrowave
Shared: Casual · Retro · 1980s

Goat Simulator
Shared: Sandbox · Casual · Action

Razortron 2000
Shared: Casual · Retro · 1980s

Game Dev Tycoon
Shared: Casual · Moddable · Indie

Planes, Bullets and Vodka
Shared: Casual · Retro · Action

DOOM + DOOM II
Shared: Retro · 1990's · Action

UFO 50
Shared: Retro · Indie · Action

Cyberhunt
Shared: Casual · Action · Indie

TheoTown
Shared: Sandbox · Casual · Moddable

Wolfenstein 3D
Shared: Retro · 1990's · Action

Trove
Shared: Sandbox · Free to Play · Casual

Hotline Miami
Shared: Action · Retro · Indie

Sand:box
Shared: Sandbox · Retro · Casual

Pinball FX
Shared: Retro · Casual · 1990's

STANDBOX
Shared: Sandbox · Casual · Action

OutDrive
Shared: Casual · Retro · 1980s

Forts
Shared: Moddable · Sandbox · Destruction

Warhammer 40,000: Boltgun
Shared: Retro · Old School · Action

ScootX
Shared: Casual · Sandbox · Moddable

Kung Fury: Street Rage - Ultimate Edition
Shared: Retro · 1980s · Action

Kaze and the Wild Masks
Shared: Casual · 1990's · Old School

The Sims™ 4
Shared: Sandbox · Casual · Free to Play