Games like Umigame
Games like Umigame include Hades, Children of Morta, Hades II, Gunfire Reborn, and Hero Siege. We matched them by the tags players give Umigame on Steam (Action Roguelike, Roguelite, Hack and Slash, Online Co-Op, and Multiplayer): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Action Roguelike · Roguelite · Hack and Slash

Children of Morta
Shared: Multiplayer · Hack and Slash · Action Roguelike

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

Gunfire Reborn
Shared: Roguelite · Online Co-Op · Roguelike

Hero Siege
Shared: Action Roguelike · Hack and Slash · Action RPG

Ravenswatch
Shared: Action Roguelike · Online Co-Op · Roguelite

Heroes of Hammerwatch
Shared: Action Roguelike · Roguelite · Multiplayer

Heroes of Hammerwatch II
Shared: Action Roguelike · Action RPG · Roguelite

Risk of Rain 2
Shared: Action Roguelike · Multiplayer · Roguelite

Ember Knights
Shared: Action Roguelike · Roguelite · Multiplayer

Moonlighter
Shared: Hack and Slash · Roguelite · Action Roguelike

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

Lost Castle
Shared: Action Roguelike · Hack and Slash · Roguelite

Streets of Rogue
Shared: Action Roguelike · Roguelite · Multiplayer

Diablo® IV
Shared: Hack and Slash · Action RPG · Online Co-Op

Wizard of Legend
Shared: Action Roguelike · Dungeon Crawler · Roguelike

Dead Cells
Shared: Action Roguelike · Roguelite · Roguelike

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

Death Must Die
Shared: Action Roguelike · Roguelite · Hack and Slash

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

ELDEN RING NIGHTREIGN
Shared: Online Co-Op · Multiplayer · Roguelike

Barony
Shared: Action Roguelike · Multiplayer · Online Co-Op

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

SWORN
Shared: Roguelite · Action Roguelike · Hack and Slash