Games like FUUU...!
Games like FUUU...! include Sonic Frontiers, Goat Simulator, Grow Home, Slime Rancher, and Pseudoregalia. We matched them by the tags players give FUUU...! on Steam (3D, 3D Platformer, Third Person, Open World, and Casual): closest matches first, and among equally close ones the better-known games.

Sonic Frontiers
Shared: 3D Platformer · Open World · 3D

Goat Simulator
Shared: Open World · Casual · Simulation

Grow Home
Shared: Open World · 3D Platformer · Singleplayer

Slime Rancher
Shared: Open World · Exploration · Singleplayer

Pseudoregalia
Shared: 3D Platformer · 3D · Exploration

Firewatch
Shared: Walking Simulator · Singleplayer · Atmospheric

The Long Dark
Shared: Open World · Exploration · Singleplayer

Chained Together
Shared: Casual · 3D Platformer · Platformer

DEATH STRANDING DIRECTOR'S CUT
Shared: Open World · Walking Simulator · Atmospheric

A Hat in Time
Shared: 3D Platformer · Third Person · Platformer

Rooftops & Alleys: The Parkour Game
Shared: 3D Platformer · 3D · Third Person

Spirit of the North
Shared: Casual · Exploration · Singleplayer

Yellow Taxi Goes Vroom
Shared: 3D Platformer · 3D · Singleplayer

Fallout 4
Shared: Open World · Singleplayer · Exploration

Hogwarts Legacy
Shared: Open World · Singleplayer · Third Person

Marvel’s Spider-Man Remastered
Shared: Open World · Singleplayer · Third Person

Grow Up
Shared: Open World · 3D Platformer · Casual

Another Crab's Treasure
Shared: 3D Platformer · Third Person · Open World

Sonic Adventure DX
Shared: 3D Platformer · Platformer · Singleplayer

Bully: Scholarship Edition
Shared: Open World · Third Person · Singleplayer

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

Crimson Desert Enhanced
Shared: Open World · Singleplayer · Exploration

DEATH STRANDING 2: ON THE BEACH
Shared: Open World · Exploration · Walking Simulator

The Witcher 3: Wild Hunt — Remastered
Shared: Open World · Singleplayer · Third Person