Games like OlliOlli World
Games like OlliOlli World include Celeste, Super Meat Boy, Geometry Dash, Only Climb: Better Together, and VVVVVV. We matched them by the tags players give OlliOlli World on Steam (Sports, Precision Platformer, Skateboarding, 2D Platformer, and 3D Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · Difficult · 2D Platformer

Super Meat Boy
Shared: Precision Platformer · 2D Platformer · Difficult

Geometry Dash
Shared: Difficult · Precision Platformer · 2D

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

VVVVVV
Shared: Precision Platformer · 2D Platformer · Platformer

Downwell
Shared: Precision Platformer · 2D Platformer · Platformer

Spelunky 2
Shared: 2D Platformer · Platformer · Difficult

Session: Skate Sim
Shared: Sports · Skateboarding · Difficult

Pizza Tower
Shared: 2D Platformer · Platformer · Indie

SONIC X SHADOW GENERATIONS
Shared: 3D Platformer · 2D Platformer · Platformer

Jump King
Shared: Precision Platformer · Difficult · Platformer

Super Meat Boy Forever
Shared: Precision Platformer · Difficult · Platformer

The End Is Nigh
Shared: Precision Platformer · Platformer · Difficult

SANABI
Shared: 2D Platformer · Action · 2D

skate.
Shared: Skateboarding · Sports · Character Customization

Katana ZERO
Shared: 2D Platformer · Platformer · Action

Pogostuck: Rage With Your Friends
Shared: Precision Platformer · Difficult · Platformer

Pro Soccer Online
Shared: Sports · Competitive · Character Customization

Ambidextro
Shared: Precision Platformer · 2D Platformer · Platformer

Alex Kidd in Miracle World DX
Shared: Precision Platformer · 2D Platformer · Difficult

Neon White
Shared: 3D Platformer · Platformer · Precision Platformer

Rain World
Shared: Difficult · Platformer · 2D Platformer

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

N++ (NPLUSPLUS)
Shared: Precision Platformer · 2D Platformer · Difficult