Games like Kiki
Games like Kiki include Portal 2, Portal, Chained Together, Supraland, and Refunct. We matched them by the tags players give Kiki on Steam (Exploration, 3D Platformer, Puzzle Platformer, Platformer, and Puzzle): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Platformer · Puzzle · Puzzle Platformer

Portal
Shared: Puzzle Platformer · 3D Platformer · Puzzle

Chained Together
Shared: Platformer · Puzzle Platformer · 3D Platformer

Supraland
Shared: Exploration · Puzzle Platformer · Puzzle

Refunct
Shared: 3D Platformer · Puzzle Platformer · Platformer

COCOON
Shared: Exploration · Puzzle · Puzzle Platformer

FEZ
Shared: Platformer · Exploration · Puzzle

ANIMAL WELL
Shared: Exploration · Puzzle Platformer · Puzzle

Mirror's Edge™
Shared: Exploration · 3D Platformer · Platformer

LIMBO
Shared: Puzzle Platformer · Platformer · Puzzle

Viewfinder
Shared: Puzzle Platformer · Puzzle · First-Person

The Big Catch: Tacklebox
Shared: 3D Platformer · Platformer · Exploration

Slime Rancher
Shared: Exploration · First-Person · Adventure

Sonic Frontiers
Shared: 3D Platformer · Exploration · Platformer

Yooka-Replaylee
Shared: Exploration · 3D Platformer · Platformer

Climb The Backrooms
Shared: Platformer · 3D Platformer · Puzzle

The Talos Principle 2
Shared: Puzzle · Exploration · Puzzle Platformer

Hob
Shared: Exploration · Puzzle · Platformer

Pseudoregalia
Shared: 3D Platformer · Exploration · Platformer

Big Walk
Shared: Exploration · Puzzle · First-Person

The Looker
Shared: Exploration · Puzzle · Funny

Human Fall Flat
Shared: Puzzle · Puzzle Platformer · Funny

A Hat in Time
Shared: 3D Platformer · Platformer · Exploration

The Exit 8
Shared: Exploration · Puzzle · 3D

