Games like Project: R.E.B.O.O.T
Games like Project: R.E.B.O.O.T include Hollow Knight, SANABI, LIMBO, Planet of Lana, and Hollow Knight: Silksong. We matched them by the tags players give Project: R.E.B.O.O.T on Steam (Indie, Action, Casual, Adventure, and Platformer): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Platformer · Indie · 2D

SANABI
Shared: Action · Adventure · Indie

LIMBO
Shared: Indie · Platformer · Adventure

Planet of Lana
Shared: Action · 2D Platformer · Indie

Hollow Knight: Silksong
Shared: Indie · 2D · Platformer

Minimalism
Shared: Indie · Action · Casual

Celeste
Shared: Indie · Platformer · 2D Platformer

BEEP
Shared: Indie · Adventure · Platformer

Ori and the Will of the Wisps
Shared: Platformer · Action · Adventure

Dust: An Elysian Tail
Shared: Action · Indie · Platformer

GRIS
Shared: Indie · Adventure · Atmospheric

Super Fancy Pants Adventure
Shared: Action · Indie · Adventure

Mark of the Ninja
Shared: Indie · Platformer · Action

Deadlight
Shared: Action · Indie · Platformer

Sonic Superstars
Shared: Action · Platformer · Adventure

Skul: The Hero Slayer
Shared: Indie · Action · 2D

Pikuniku
Shared: Indie · Casual · Adventure

Pizza Tower
Shared: Indie · 2D Platformer · Platformer

Nihilumbra
Shared: Indie · Adventure · Casual

Neva
Shared: Indie · Adventure · Platformer

Katana ZERO
Shared: Action · Indie · Platformer

Rain World
Shared: Indie · Atmospheric · Platformer

Nine Sols
Shared: Action · Platformer · Indie

Sonic Origins
Shared: Action · Adventure · 2D Platformer