Games like Castle Warriors
Games like Castle Warriors include Vampire Survivors, Balatro, Skul: The Hero Slayer, Slay the Spire 2, and 9 Kings. We matched them by the tags players give Castle Warriors on Steam (Auto Battler, Roguelike, Strategy, Roguelite, and Action Roguelike): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Roguelite · Roguelike

Balatro
Shared: Roguelike · Strategy · Deckbuilding

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

Slay the Spire 2
Shared: Roguelike · Strategy · Deckbuilding

9 Kings
Shared: Auto Battler · Strategy · Roguelike

Vampire Crawlers: The Turbo Wildcard from Vampire Survivors
Shared: Roguelike · Strategy · Deckbuilding

Slay the Spire
Shared: Roguelike · Strategy · Deckbuilding

Megabonk
Shared: Roguelike · Action Roguelike · Roguelite

Dead Cells
Shared: Roguelike · Action Roguelike · Roguelite

Loop Hero
Shared: Roguelike · Roguelite · Deckbuilding

Super Fantasy Kingdom
Shared: Strategy · Roguelike · Auto Battler

The Binding of Isaac: Rebirth
Shared: Roguelike · Action Roguelike · Pixel Graphics

Death Must Die
Shared: Action Roguelike · Roguelite · Pixel Graphics

One Step From Eden
Shared: Roguelite · Action Roguelike · Deckbuilding

Hades
Shared: Roguelite · Action Roguelike · Roguelike

Luck be a Landlord
Shared: Strategy · Roguelite · Deckbuilding

Dungreed
Shared: Roguelike · Action Roguelike · Roguelite

Peglin
Shared: Roguelike · Roguelite · Deckbuilding

Halls of Torment
Shared: Roguelite · Action Roguelike · Roguelike

Just King
Shared: Auto Battler · Strategy · Roguelite

Rogue Legacy
Shared: Roguelike · Action Roguelike · Action

Wizard of Legend
Shared: Roguelike · Action Roguelike · Pixel Graphics

Sephiria
Shared: Roguelike · Roguelite · Action Roguelike

He is Coming
Shared: Roguelike · Auto Battler · Strategy