Games like Haiku, the Robot
Games like Haiku, the Robot include Hollow Knight, Rain World, Ori and the Will of the Wisps, ANIMAL WELL, and Momodora: Reverie Under The Moonlight. We matched them by the tags players give Haiku, the Robot on Steam (Metroidvania, Adventure, Exploration, Pixel Graphics, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Metroidvania · Platformer · Exploration

Rain World
Shared: Exploration · Atmospheric · Pixel Graphics

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

ANIMAL WELL
Shared: Metroidvania · Exploration · Pixel Graphics

Momodora: Reverie Under The Moonlight
Shared: Metroidvania · Pixel Graphics · Exploration

Hollow Knight: Silksong
Shared: Metroidvania · Exploration · Adventure

Dead Cells
Shared: Adventure · Metroidvania · Pixel Graphics

Axiom Verge
Shared: Metroidvania · Pixel Graphics · Platformer

Gato Roboto
Shared: Metroidvania · Adventure · Pixel Graphics

SANABI
Shared: Pixel Graphics · Adventure · 2D Platformer

Stray
Shared: Adventure · Atmospheric · Exploration

Blasphemous
Shared: Metroidvania · Pixel Graphics · Dark Fantasy

Owlboy
Shared: Adventure · Pixel Graphics · Metroidvania

MIO: Memories in Orbit
Shared: Metroidvania · Exploration · Atmospheric

Celeste
Shared: Pixel Graphics · Platformer · Adventure

Prince of Persia The Lost Crown
Shared: Metroidvania · Exploration · Adventure

Terraria
Shared: Adventure · Pixel Graphics · Exploration

Unbound: Worlds Apart
Shared: Adventure · Metroidvania · Atmospheric

The Messenger
Shared: Metroidvania · Pixel Graphics · Platformer

Well Dweller
Shared: Metroidvania · Adventure · Dark Fantasy

Rabi-Ribi
Shared: Metroidvania · Pixel Graphics · Exploration

Fallout 4
Shared: Exploration · Adventure · Open World

Blasphemous 2
Shared: Metroidvania · Adventure · Pixel Graphics

Nine Sols
Shared: Metroidvania · Platformer · Atmospheric