Games like Happy Halloween
Games like Happy Halloween include Home Behind, Rain World, BidKing, Chained Together, and Hollow Knight. We matched them by the tags players give Happy Halloween on Steam (Casual, Simulation, Platformer, Adventure, and Survival): closest matches first, and among equally close ones the better-known games.

Home Behind
Shared: Adventure · Casual · Survival

Rain World
Shared: Survival · Platformer · Indie

BidKing
Shared: Casual · Simulation · Strategy

Chained Together
Shared: Casual · Platformer · Adventure

Hollow Knight
Shared: Platformer · 2D · Indie

Terraria
Shared: Survival · 2D · Adventure

Don't Starve Together
Shared: Survival · Adventure · Simulation

Game Dev Tycoon
Shared: Simulation · Casual · Indie

Thank Goodness You're Here!
Shared: Adventure · Casual · Platformer

Plague Inc: Evolved
Shared: Simulation · Casual · Indie

LIMBO
Shared: Platformer · Indie · Adventure

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

Russian Life Simulator
Shared: Simulation · 2D · Casual

The Long Dark
Shared: Survival · Adventure · Simulation

BEEP
Shared: Platformer · Adventure · Indie

DAVE THE DIVER
Shared: Casual · Adventure · Simulation

Home Behind 2
Shared: Adventure · Simulation · Indie

Pikuniku
Shared: Casual · Adventure · Indie

60 Seconds! Reatomized
Shared: 2D · Strategy · Casual

FEZ
Shared: Platformer · Indie · Casual

Mini Motorways
Shared: Simulation · Casual · Strategy

The Escapists
Shared: Simulation · 2D · Strategy

Town of Salem
Shared: Casual · Indie · Strategy

Deadlight
Shared: Platformer · Adventure · Indie