Games like Dark Lord
Games like Dark Lord include Sultan's Game, Reigns, Balatro, The Test, and Dispatch. We matched them by the tags players give Dark Lord on Steam (Simulation, Singleplayer, Card Game, Visual Novel, and Dark Humor): closest matches first, and among equally close ones the better-known games.

Sultan's Game
Shared: Singleplayer · Simulation · Card Game

Reigns
Shared: Card Game · Singleplayer · Simulation

Balatro
Shared: Card Game · Singleplayer · Roguelike

The Test
Shared: Simulation · Choose Your Own Adventure · Singleplayer

Dispatch
Shared: Singleplayer · Story Rich · Choose Your Own Adventure

鬼谷八荒 Tale of Immortal
Shared: Singleplayer · Simulation · Choose Your Own Adventure

Library Of Ruina
Shared: Card Game · Story Rich · Singleplayer

Slay the Princess — The Pristine Cut
Shared: Visual Novel · Story Rich · Choose Your Own Adventure

Far Away
Shared: Singleplayer · Visual Novel · Story Rich

The Life and Suffering of Sir Brante
Shared: Story Rich · Visual Novel · Singleplayer

Choice of Life: Middle Ages 2
Shared: Singleplayer · Simulation · Card Game

Portal 2
Shared: Singleplayer · Dark Humor · Story Rich

Death and Taxes
Shared: Simulation · Story Rich · Strategy

Slay the Spire
Shared: Card Game · Roguelike · Singleplayer

Emily is Away <3
Shared: Simulation · Singleplayer · Visual Novel

Meme Mayhem
Shared: Card Game · Singleplayer · Roguelike

Sovereign Tower
Shared: Visual Novel · Choose Your Own Adventure · Singleplayer

Marco & The Galaxy Dragon
Shared: Visual Novel · Simulation · Story Rich

Limbus Company
Shared: Story Rich · Visual Novel · Singleplayer

Game Dev Tycoon
Shared: Simulation · Singleplayer · Strategy

Growing Up
Shared: Simulation · Story Rich · Singleplayer

Night in the Woods
Shared: Story Rich · Dark Humor · Singleplayer

60 Seconds! Reatomized
Shared: Dark Humor · Choose Your Own Adventure · 2D