Games like HalloweenStory
Games like HalloweenStory include LIMBO, SANABI, Broforce, Skul: The Hero Slayer, and Out There Somewhere. We matched them by the tags players give HalloweenStory on Steam (Action, Casual, Adventure, 2D, and Platformer): closest matches first, and among equally close ones the better-known games.

LIMBO
Shared: Puzzle Platformer · Platformer · 2D

SANABI
Shared: Action · Pixel Graphics · Adventure

Broforce
Shared: Action · 2D · Pixel Graphics

Skul: The Hero Slayer
Shared: Action · 2D · Pixel Graphics

Out There Somewhere
Shared: Platformer · Adventure · Pixel Graphics

Defy Gravity Extended
Shared: Platformer · Puzzle Platformer · Action

Dead Cells
Shared: Adventure · 2D · Pixel Graphics

Shovel Knight: Treasure Trove
Shared: Platformer · Pixel Graphics · Action

MO:Astray
Shared: Action · Adventure · Pixel Graphics

FEZ
Shared: Platformer · Pixel Graphics · Adventure

Minimalism
Shared: Casual · Action · Adventure

Sonic Mania
Shared: 2D · Platformer · Pixel Graphics

Celeste
Shared: Pixel Graphics · Platformer · 2D

Sonic Origins
Shared: Action · Adventure · Casual

Moonleap
Shared: Platformer · Puzzle Platformer · Minimalist

DAVE THE DIVER
Shared: Casual · Adventure · Pixel Graphics

Phoenotopia: Awakening
Shared: Action · Adventure · Platformer

Owlboy
Shared: Adventure · Pixel Graphics · Platformer

Katana ZERO
Shared: Action · Pixel Graphics · Platformer

ElecHead
Shared: Action · Platformer · Puzzle Platformer

BOKURA
Shared: Adventure · Action · Pixel Graphics

BEEP
Shared: Adventure · Platformer · 2D

Hollow Knight
Shared: Platformer · 2D · Adventure

Terraria
Shared: 2D · Adventure · Pixel Graphics