Games like Titan Quest: Atlantis
Games like Titan Quest: Atlantis include Last Epoch, Path of Exile 2, Black Myth: Wukong, Wo Long: Fallen Dynasty, and Fatekeeper. We matched them by the tags players give Titan Quest: Atlantis on Steam (Action, RPG, Gore, Hack and Slash, and Action RPG): closest matches first, and among equally close ones the better-known games.

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

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

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

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

Fatekeeper
Shared: Action · RPG · Action RPG

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

Middle-earth: Shadow of War
Shared: Action · RPG · Gore

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

Hades II
Shared: Action · Hack and Slash · RPG

God of War Ragnarök
Shared: Action · RPG · Hack and Slash

Titan Quest II
Shared: RPG · Action · Action RPG

Middle-earth™: Shadow of Mordor™
Shared: Action · RPG · Action RPG

Warframe
Shared: Action · Action RPG · RPG

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

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

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

Kingdoms of Amalur: Re-Reckoning
Shared: Action · RPG · Action RPG

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

The Incredible Adventures of Van Helsing
Shared: RPG · Action · Hack and Slash

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

Torchlight III
Shared: RPG · Action · Hack and Slash

Minecraft Dungeons
Shared: RPG · Hack and Slash · Action

Nioh 3
Shared: Action · RPG · Action RPG

Vikings - Wolves of Midgard
Shared: RPG · Action · Hack and Slash