Games like Idle Demon Lord II
Games like Idle Demon Lord II include Grim Dawn, Path of Exile, Wolcen: Lords of Mayhem, Path of Exile 2, and Last Epoch. We matched them by the tags players give Idle Demon Lord II on Steam (Idler, Action RPG, Loot, Hack and Slash, and Dark Fantasy): closest matches first, and among equally close ones the better-known games.

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

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

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

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

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

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

Dragon Cliff
Shared: Idler · Loot · RPG

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

Idle Champions of the Forgotten Realms
Shared: Idler · Incremental · Singleplayer

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

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

Diablo II: Resurrected – Infernal Edition
Shared: Action RPG · Hack and Slash · RPG

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

The Slormancer
Shared: Loot · Action RPG · Hack and Slash

Path of Idle: Old Gods Rising
Shared: Idler · Loot · RPG

Chronicon
Shared: Action RPG · Loot · Hack and Slash

Deskrawl: Idle ARPG
Shared: Idler · Action RPG · Loot

Torchlight
Shared: Action RPG · Hack and Slash · RPG

Firestone – Idle Clicker Online RPG
Shared: Idler · Incremental · Action RPG

Melvor Idle
Shared: Idler · RPG · Singleplayer

ELDEN RING
Shared: Dark Fantasy · Action RPG · RPG

Dark Hunting Ground
Shared: Action RPG · Loot · Idler

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

Cookie Clicker
Shared: Idler · Incremental · Indie