Games like Ultra Age
Games like Ultra Age include Hades, Black Myth: Wukong, Devil May Cry 5, God of War, and Stellar Blade™. We matched them by the tags players give Ultra Age on Steam (Difficult, Action, Hack and Slash, Action RPG, and Action Roguelike): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Hack and Slash · Action Roguelike · Action

Black Myth: Wukong
Shared: Action · Action RPG · Singleplayer

Devil May Cry 5
Shared: Action · Hack and Slash · Third Person

God of War
Shared: Action · Singleplayer · Hack and Slash

Stellar Blade™
Shared: Action · Hack and Slash · Singleplayer

METAL GEAR RISING: REVENGEANCE
Shared: Action · Hack and Slash · Singleplayer

Wolcen: Lords of Mayhem
Shared: Hack and Slash · Action RPG · Action

LIZARDS MUST DIE
Shared: Hack and Slash · Difficult · Third Person

The First Berserker: Khazan
Shared: Difficult · Hack and Slash · Action RPG

Darksiders™
Shared: Action · Hack and Slash · Singleplayer

Hades II
Shared: Action · Hack and Slash · Action Roguelike

Skul: The Hero Slayer
Shared: Action · Action Roguelike · Indie

Mortal Shell
Shared: Action · Difficult · Singleplayer

Ghostrunner
Shared: Action · Difficult · Hack and Slash

NINJA GAIDEN 4
Shared: Action · Hack and Slash · Difficult

Monster Hunter: World
Shared: Action · Difficult · Third Person

WUCHANG: Fallen Feathers
Shared: Difficult · Action RPG · Hack and Slash

ELDEN RING
Shared: Difficult · Action RPG · Third Person

Wo Long: Fallen Dynasty
Shared: Action · Difficult · Action RPG

Thymesia
Shared: Difficult · Hack and Slash · Singleplayer

Sifu
Shared: Action · Difficult · Singleplayer

DmC: Devil May Cry
Shared: Action · Hack and Slash · Third Person

ICEY
Shared: Action · Hack and Slash · Singleplayer

The Surge
Shared: Action · Difficult · Third Person