Games like SpeedRooms
Games like SpeedRooms include Portal 2, Portal, Neon White, Celeste, and Super Meat Boy. We matched them by the tags players give SpeedRooms on Steam (Precision Platformer, Action, 3D Platformer, Puzzle Platformer, and Platformer): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Platformer · Puzzle Platformer · First-Person

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

Neon White
Shared: 3D Platformer · Action · Platformer

Celeste
Shared: Precision Platformer · Platformer · Indie

Super Meat Boy
Shared: Precision Platformer · Platformer · Indie

Super Meat Boy 3D
Shared: Precision Platformer · Action · 3D Platformer

SEUM: Speedrunners from Hell
Shared: Precision Platformer · 3D Platformer · Platformer

SONIC X SHADOW GENERATIONS
Shared: Action · 3D Platformer · Platformer

Clustertruck
Shared: Action · 3D Platformer · First-Person

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

Cyber Hook
Shared: 3D Platformer · Action · Indie

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

Only Climb: Better Together
Shared: Precision Platformer · 3D Platformer · Platformer

LIMBO
Shared: Puzzle Platformer · Platformer · Indie

Lunistice
Shared: 3D Platformer · Platformer · 3D

EDGE
Shared: Puzzle Platformer · Action · Platformer

The Ball
Shared: 3D Platformer · Puzzle Platformer · Action

Trine 3: The Artifacts of Power
Shared: Puzzle Platformer · 3D Platformer · Controller

Planet of Lana
Shared: Action · Puzzle Platformer · Platformer

White Knuckle
Shared: 3D Platformer · Precision Platformer · First-Person

Sonic Frontiers
Shared: 3D Platformer · Action · 3D

Refunct
Shared: 3D Platformer · Puzzle Platformer · First-Person

Last Train Outta' Wormtown
Shared: Action · 3D Platformer · Platformer

Crash Bandicoot™ 4: It’s About Time
Shared: Action · 3D Platformer · Platformer