Games like Gah!
Games like Gah! include Hades, Black Myth: Wukong, Hades II, Wolcen: Lords of Mayhem, and Moonlighter. We matched them by the tags players give Gah! on Steam (Action RPG, Class-Based, Perma Death, Roguelite, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Roguelite · Singleplayer · Hack and Slash

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

Hades II
Shared: Roguelite · Action RPG · Hack and Slash

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

Moonlighter
Shared: Roguelite · Action RPG · Hack and Slash

Diablo® IV
Shared: Action RPG · Hack and Slash · Singleplayer

Grim Dawn
Shared: Action RPG · Hack and Slash · Singleplayer

Last Epoch
Shared: Action RPG · Hack and Slash · RPG

Heroes of Hammerwatch II
Shared: Action RPG · Roguelite · Dungeon Crawler

Soulstone Survivors
Shared: Action RPG · Roguelite · Singleplayer

Path of Exile 2
Shared: Action RPG · Hack and Slash · RPG

Path of Exile
Shared: Action RPG · Hack and Slash · Dungeon Crawler

God of War
Shared: Singleplayer · Combat · Action

Torchlight II
Shared: Action RPG · RPG · Hack and Slash

Shape of Dreams
Shared: Roguelite · Hack and Slash · Action Roguelike

Jotunnslayer: Hordes of Hel
Shared: Action RPG · Roguelite · Singleplayer

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

Realm of Ink
Shared: Roguelite · Action RPG · Stylized

Death Must Die
Shared: Roguelite · Action RPG · RPG

Halls of Torment
Shared: Roguelite · Action RPG · Action Roguelike

UnderMine
Shared: Roguelite · Dungeon Crawler · Singleplayer

No Rest for the Wicked
Shared: Action RPG · Combat · Hack and Slash

Titan Quest II
Shared: Action RPG · Hack and Slash · RPG

Solo Leveling: ARISE OVERDRIVE
Shared: Action RPG · Combat · Singleplayer