Games like Crumble
Games like Crumble include Clustertruck, Gang Beasts, Human Fall Flat, A Hat in Time, and Chained Together. We matched them by the tags players give Crumble on Steam (3D Platformer, Platformer, Indie, Action, and Adventure): closest matches first, and among equally close ones the better-known games.

Clustertruck
Shared: 3D Platformer · Action · Parkour

Gang Beasts
Shared: Action · Physics · Funny

Human Fall Flat
Shared: Adventure · Physics · Funny

A Hat in Time
Shared: 3D Platformer · Cute · Indie

Chained Together
Shared: Platformer · Adventure · 3D Platformer

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

Pikuniku
Shared: Indie · Adventure · Cute

Portal 2
Shared: Platformer · 3D Platformer · Funny

A Story About My Uncle
Shared: Adventure · Indie · Parkour

Yooka-Laylee
Shared: 3D Platformer · Indie · Platformer

Neon White
Shared: 3D Platformer · Platformer · Action

Haste
Shared: 3D Platformer · Parkour · Action

SpeedRunners
Shared: Indie · Platformer · Action

Woodle Tree Adventures
Shared: Platformer · Indie · 3D Platformer

Climber Animals: Together
Shared: Platformer · 3D Platformer · Physics

Pumpkin Jack
Shared: 3D Platformer · Action · Adventure

Tiny and Big: Grandpas Leftovers
Shared: Indie · Platformer · 3D Platformer

Broforce
Shared: Action · Platformer · Indie

Ben and Ed
Shared: Action · 3D Platformer · Parkour

Wobbly Life
Shared: Adventure · Action · Indie

Just Cause™ 3
Shared: Action · Destruction · Adventure

Getting Over It with Bennett Foddy
Shared: Platformer · Physics · Indie

Psychonauts
Shared: Platformer · Adventure · 3D Platformer

Spyro™ Reignited Trilogy
Shared: 3D Platformer · Adventure · Action