Games like Happy Day
Games like Happy Day include Slime Rancher, Fallout 4, Slime Rancher 2, The Long Dark, and Hello Kitty Island Adventure. We matched them by the tags players give Happy Day on Steam (Adventure, Simulation, Idler, Exploration, and Life Sim): closest matches first, and among equally close ones the better-known games.

Slime Rancher
Shared: Adventure · Exploration · Cute

Fallout 4
Shared: Adventure · Exploration · Open World

Slime Rancher 2
Shared: Adventure · Cute · Open World

The Long Dark
Shared: Exploration · Adventure · Open World

Hello Kitty Island Adventure
Shared: Adventure · Simulation · Open World

Thief Simulator
Shared: Simulation · Adventure · Open World

Crime Scene Cleaner
Shared: Simulation · Exploration · Singleplayer

Internet Cafe Simulator 2
Shared: Simulation · Exploration · 3D

Fallout: New Vegas
Shared: Open World · Exploration · Adventure

S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: FPS · Open World · Exploration

TOGETHER BnB
Shared: Simulation · 3D · Adventure

Firewatch
Shared: Adventure · Exploration · Open World

The Forest
Shared: Adventure · Open World · Exploration

Metro Exodus
Shared: FPS · Open World · Adventure

Far Cry® 4
Shared: Adventure · Open World · FPS

PEAK
Shared: Adventure · Exploration · 3D

Far Cry® 6
Shared: FPS · Adventure · Open World

Disney Dreamlight Valley
Shared: Adventure · Life Sim · Exploration

Far Cry 3
Shared: Adventure · FPS · Open World

No Man's Sky
Shared: Exploration · Open World · Adventure

Stray
Shared: Adventure · Exploration · Cute

Far Cry® Primal
Shared: Adventure · Open World · Exploration

Sea of Thieves: 2026 Edition
Shared: Adventure · Open World · Exploration

Cyberpunk 2077
Shared: Open World · FPS · Exploration