Games like Wave of Darkness
Games like Wave of Darkness include Black Myth: Wukong, Wolcen: Lords of Mayhem, Last Epoch, Warframe, and Warhammer 40,000: Inquisitor - Martyr. We matched them by the tags players give Wave of Darkness on Steam (Action, RPG, Indie, and Action RPG): closest matches first, and among equally close ones the better-known games.

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

Wolcen: Lords of Mayhem
Shared: Action RPG · RPG · Action

Last Epoch
Shared: Action RPG · RPG · Action

Warframe
Shared: Action · Action RPG · RPG

Warhammer 40,000: Inquisitor - Martyr
Shared: RPG · Action · Action RPG

The Incredible Adventures of Van Helsing
Shared: RPG · Action · Action RPG

Bastion
Shared: Action · Indie · RPG

Hades II
Shared: Action · RPG · Action RPG

Torchlight II
Shared: RPG · Action RPG · Action

Path of Exile 2
Shared: RPG · Action RPG · Action

Hero Siege
Shared: Action RPG · RPG · Action

ATLYSS
Shared: RPG · Action RPG · Action

Dragon's Dogma 2
Shared: RPG · Action RPG · Action

MONSTER HUNTER RISE
Shared: Action · RPG · Action RPG

Hades
Shared: Indie · Action · RPG

Monster Hunter: World
Shared: Action · RPG · Action RPG

ELDEN RING
Shared: RPG · Action RPG · Action

Warhammer 40,000: Inquisitor - Prophecy
Shared: Action · RPG · Indie

The Ascent
Shared: RPG · Action · Indie

FINAL FANTASY VII REBIRTH
Shared: Action · RPG · Action RPG

Grim Dawn
Shared: Action RPG · RPG · Indie

Of Ash And Steel
Shared: Action · Action RPG · RPG

FINAL FANTASY VII REMAKE INTERGRADE
Shared: RPG · Action RPG · Action

CrossCode
Shared: RPG · Action RPG · Indie