Games like Undungeon
Games like Undungeon include Eastward, Black Myth: Wukong, Hyper Light Drifter, The Binding of Isaac: Rebirth, and SANABI. We matched them by the tags players give Undungeon on Steam (Action RPG, Atmospheric, Pixel Graphics, Dungeon Crawler, and Post-apocalyptic): closest matches first, and among equally close ones the better-known games.
Eastward
Shared: Pixel Graphics · Action RPG · Atmospheric
Black Myth: Wukong
Shared: Action RPG · Atmospheric · Story Rich
Hyper Light Drifter
Shared: Pixel Graphics · Atmospheric · Difficult
The Binding of Isaac: Rebirth
Shared: Pixel Graphics · Dungeon Crawler · Difficult
SANABI
Shared: Pixel Graphics · Story Rich · 2D
Rain World
Shared: Atmospheric · Difficult · Pixel Graphics
Noita
Shared: Pixel Graphics · Dungeon Crawler · Difficult
Fallout 4
Shared: Post-apocalyptic · Atmospheric · Adventure
The Slormancer
Shared: Action RPG · Dungeon Crawler · Pixel Graphics
Wolcen: Lords of Mayhem
Shared: Action RPG · Adventure · Dungeon Crawler
Celeste
Shared: Pixel Graphics · Difficult · Indie
OneShot
Shared: Pixel Graphics · Atmospheric · Story Rich
Enter the Gungeon
Shared: Pixel Graphics · Dungeon Crawler · Difficult
CrossCode
Shared: Action RPG · Pixel Graphics · 2D
Hero Siege
Shared: Action RPG · Pixel Graphics · Indie
Skul: The Hero Slayer
Shared: Pixel Graphics · Indie · 2D
Grim Dawn
Shared: Action RPG · Dungeon Crawler · RPG
Hollow Knight
Shared: Difficult · 2D · Atmospheric
Hades II
Shared: Action RPG · Dungeon Crawler · Action
The Witcher 3: Wild Hunt — Remastered
Shared: Atmospheric · Story Rich · Adventure
The Final Station
Shared: Pixel Graphics · Post-apocalyptic · 2D
Hades
Shared: Indie · Dungeon Crawler · Story Rich
Hollow Knight: Silksong
Shared: Difficult · 2D · Indie
Finding Paradise
Shared: Pixel Graphics · 2D · Atmospheric