Games like Robot Adventure
Games like Robot Adventure include Celeste, Webbed, Momodora: Reverie Under The Moonlight, Super Meat Boy, and Thank Goodness You're Here!. We matched them by the tags players give Robot Adventure on Steam (Exploration, Precision Platformer, Side Scroller, 2D Platformer, and Collectathon): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · 2D Platformer · Platformer

Webbed
Shared: 2D Platformer · Exploration · Cute

Momodora: Reverie Under The Moonlight
Shared: Side Scroller · 2D Platformer · Exploration

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

Thank Goodness You're Here!
Shared: Exploration · 2D Platformer · Funny

Öoo
Shared: Exploration · 2D Platformer · Puzzle

Leap Year
Shared: Exploration · Precision Platformer · 2D Platformer

A Hat in Time
Shared: Collectathon · Cute · Exploration

Thomas Was Alone
Shared: Side Scroller · Precision Platformer · 2D Platformer

VVVVVV
Shared: Precision Platformer · 2D Platformer · Platformer

Bō: Path of the Teal Lotus
Shared: Precision Platformer · Exploration · Side Scroller

Geometry Dash
Shared: Precision Platformer · 2D · Platformer

FEZ
Shared: Exploration · Puzzle · Platformer

Prince of Persia The Lost Crown
Shared: Exploration · 2D Platformer · Side Scroller

Slime Rancher
Shared: Exploration · Cute · Adventure

ANIMAL WELL
Shared: Exploration · Puzzle · Platformer

Downwell
Shared: Precision Platformer · 2D Platformer · Platformer

Rain World
Shared: Exploration · Platformer · 2D

Pikuniku
Shared: Puzzle · Cute · Indie

MARSUPILAMI - HOOBADVENTURE
Shared: Exploration · Side Scroller · 2D Platformer

Cat Goes Fishing
Shared: Exploration · 2D · Cute

Lone Fungus
Shared: 2D Platformer · Precision Platformer · Exploration

Bread & Fred
Shared: 2D Platformer · Precision Platformer · Cute

Hollow Knight
Shared: Platformer · Exploration · 2D

