Games like Lokko
Games like Lokko include Portal 2, skate., Only Climb: Better Together, Yooka-Replaylee, and ALTF4. We matched them by the tags players give Lokko on Steam (Early Access, 3D Platformer, Cartoony, Sandbox, and Character Customization): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Platformer · 3D Platformer · Puzzle Platformer

skate.
Shared: Character Customization · Early Access · Sandbox

Only Climb: Better Together
Shared: 3D Platformer · Platformer · Character Customization

Yooka-Replaylee
Shared: 3D Platformer · Character Customization · Platformer

ALTF4
Shared: 3D Platformer · Third Person · Platformer

Portal
Shared: 3D Platformer · Puzzle Platformer · Puzzle

Tinykin
Shared: 3D Platformer · Cartoony · Third Person

Squirrel with a Gun
Shared: Sandbox · 3D Platformer · Platformer

Pumpkin Jack
Shared: 3D Platformer · Third Person · Collectathon

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

TY the Tasmanian Tiger
Shared: 3D Platformer · Platformer · Cartoony

s&box
Shared: Sandbox · 3D Platformer · Casual

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

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

Spyro™ Reignited Trilogy
Shared: 3D Platformer · Platformer · Cartoony

Human Fall Flat
Shared: Sandbox · Puzzle Platformer · Puzzle

Geometry Dash
Shared: Level Editor · Platformer · Character Customization

Rolled Out!
Shared: 3D Platformer · Puzzle Platformer · Early Access

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

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

SpongeBob SquarePants: Titans of the Tide
Shared: 3D Platformer · Platformer · Puzzle Platformer

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

Hamster Hustle
Shared: 3D Platformer · Character Customization · Platformer

Psychonauts
Shared: 3D Platformer · Platformer · Third Person