Games like No More Rainbows
Games like No More Rainbows include Gorilla Tag, Portal 2, Neon White, Refunct, and A Story About My Uncle. We matched them by the tags players give No More Rainbows on Steam (Platformer, 3D Platformer, Parkour, Action, and Stylized): closest matches first, and among equally close ones the better-known games.

Gorilla Tag
Shared: VR · Parkour · 3D Platformer

Portal 2
Shared: Platformer · Singleplayer · First-Person

Neon White
Shared: 3D Platformer · Platformer · Parkour

Refunct
Shared: 3D Platformer · Parkour · Platformer

A Story About My Uncle
Shared: Parkour · Platformer · First-Person

Clustertruck
Shared: Parkour · 3D Platformer · Action

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

Resident Evil 7 Biohazard
Shared: VR · First-Person · Singleplayer

VHOLUME
Shared: Parkour · 3D Platformer · Platformer

Mirror's Edge™ Catalyst
Shared: Parkour · 3D Platformer · Platformer

Portal
Shared: 3D Platformer · First-Person · Singleplayer

White Knuckle
Shared: Parkour · 3D Platformer · Platformer

Pseudoregalia
Shared: 3D Platformer · Parkour · Platformer

Bomb Rush Cyberfunk
Shared: 3D Platformer · Action · Parkour

Resident Evil Village
Shared: Action · VR · First-Person

STRIDE
Shared: VR · Action · Platformer

Pavlov
Shared: VR · Action · First-Person

BONEWORKS
Shared: VR · Action · Singleplayer

Psychonauts
Shared: Platformer · Action · 3D Platformer

Grand Theft Auto V Legacy
Shared: Action · First-Person · Singleplayer

Sonic Lost World
Shared: Platformer · 3D Platformer · Parkour

Sonic Adventure 2
Shared: 3D Platformer · Platformer · Action

Crash Bandicoot™ N. Sane Trilogy
Shared: 3D Platformer · Platformer · Action

Kao the Kangaroo: Round 2 (2003 re-release)
Shared: 3D Platformer · Platformer · Action