Games like Double Knight
Games like Double Knight include Hades, Shape of Dreams, Hades II, Moonlighter, and Cinderia. We matched them by the tags players give Double Knight on Steam (Action Roguelike, Hack and Slash, Action, Dungeon Crawler, and Roguelite): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Action Roguelike · Hack and Slash · Roguelite

Shape of Dreams
Shared: Action Roguelike · Hack and Slash · Roguelite

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

Moonlighter
Shared: Hack and Slash · Action Roguelike · Dungeon Crawler

Cinderia
Shared: Action Roguelike · Hack and Slash · Action

UnderMine
Shared: Action Roguelike · Roguelite · Dungeon Crawler

Heroes of Hammerwatch II
Shared: Action Roguelike · Dungeon Crawler · Action

Mortal Sin
Shared: Action Roguelike · Hack and Slash · Dungeon Crawler

The Binding of Isaac
Shared: Action Roguelike · Action · Top-Down

Megabonk
Shared: Action Roguelike · Roguelite · Action

Skul: The Hero Slayer
Shared: Action Roguelike · Action · Roguelite

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

Heroes of Hammerwatch
Shared: Action Roguelike · Roguelite · Dungeon Crawler

Soulstone Survivors
Shared: Action Roguelike · Roguelite · Hack and Slash

Have a Nice Death
Shared: Action Roguelike · Hack and Slash · Action

Vampire Survivors
Shared: Action Roguelike · Roguelite · Action

Lost Castle
Shared: Action Roguelike · Hack and Slash · Dungeon Crawler

Halls of Torment
Shared: Action Roguelike · Roguelite · Action

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

Slasher's Keep
Shared: Action Roguelike · Dungeon Crawler · Action

Windblown
Shared: Action Roguelike · Hack and Slash · Roguelite

Cult of the Lamb
Shared: Action Roguelike · Dungeon Crawler · Roguelite

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Dungeon Crawler · Indie

Spell Disk
Shared: Action Roguelike · Hack and Slash · Roguelite