Games like The Treehouse Man
Games like The Treehouse Man include Hollow Knight, Hollow Knight: Silksong, Dust: An Elysian Tail, Hyper Light Drifter, and Bastion. We matched them by the tags players give The Treehouse Man on Steam (Adventure, Indie, Action, Strategy, and RPG): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Indie · 2D · Adventure

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

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

Hyper Light Drifter
Shared: Indie · Adventure · Action

Bastion
Shared: Indie · Action · RPG

SteamWorld Heist
Shared: Strategy · Indie · Adventure

ICEY
Shared: Action · Adventure · Indie

The Witcher 3: Wild Hunt — Remastered
Shared: RPG · Adventure · Atmospheric

Dungeon Munchies
Shared: Indie · Action · Adventure

Eastern Exorcist
Shared: Action · Adventure · RPG

GRIS
Shared: Indie · Adventure · Atmospheric

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

SANABI
Shared: Action · Adventure · Indie

Shovel Knight: Treasure Trove
Shared: Indie · Adventure · Action

The Escapists
Shared: Strategy · Indie · 2D

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

Black Myth: Wukong
Shared: Action · RPG · Singleplayer

Celeste
Shared: Indie · Adventure · Great Soundtrack

Mount & Blade II: Bannerlord
Shared: Strategy · RPG · Action

The Dungeon Of Naheulbeuk: The Amulet Of Chaos
Shared: Adventure · RPG · Strategy

Rogue Legacy 2
Shared: Action · Indie · Adventure

South Park™: The Stick of Truth™
Shared: Adventure · RPG · Action

BEEP
Shared: Indie · Adventure · 2D

Deadlight
Shared: Action · Indie · Adventure