Single-player games like Castellan
Below are 8 single-player Steam games similar to Castellan, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Castellan page.
Ranked picks
- 1
Woods Of War
Single-player alternative to Castellan — playable solo, no multiplayer required. Shares Action and Strategy with Castellan.
Build your deck in battle to turn your tree into an impenetrable fortress against the onslaught of increasingly powerful enemies.
- 2
Ink & Void
Single-player alternative to Castellan — playable solo, no multiplayer required. Shares Strategy and Indie with Castellan.
A storybook tower defense where stationery knights fight the Void. Deploy pencil swordsmen, fountain pen mages, and eraser monks across four chapters. Evolve units via class changes and build your deck with cards earned each stage. Languages: Japanese / English / Chinese
- 3
Sheeple
Single-player alternative to Castellan — playable solo, no multiplayer required. Shares Action and Strategy with Castellan.
Cast cards to turn the tides of the battlefield, gather your army, and fight to regain The Original Sheep! Sheeple is a grand real time Auto battler with roguelike and deck-building elements.
- 4
Slay the Horde
Single-player alternative to Castellan — playable solo, no multiplayer required. Shares Action and Strategy with Castellan.
Slay the Horde is a roguelike deckbuilder about building a screen-clearing engine of destruction. Build a deck of spells, stack upgrades, abuse elemental effects, and annihilate increasingly unreasonable numbers of goblins.
- 5
Ancient Sacrifice
Single-player alternative to Castellan — playable solo, no multiplayer required. Shares Strategy and Indie with Castellan.
RTS x Deck-Building Card Battle!An RTS-style card game that you can easily play with a deck of 10 cards and simple rules.
- 6
The Tower of Seven
Single-player alternative to Castellan — playable solo, no multiplayer required. Shares Strategy and Indie with Castellan.
The Tower of Seven is a board-game-inspired roguelike where cards, dice, and demon rules reshape every floor. Build a three-card chain, trigger upright or reversed effects, and rewrite the table as you climb toward fate.
- 7
WallFront
Single-player alternative to Castellan — playable solo, no multiplayer required. Shares Action and Strategy with Castellan.
Defend the final wall in this strategic blend of Tower Defense and Roguelite. Position an elite squad with unique abilities, combine powerful artifacts, and evolve with permanent meta-progression. In Wallfront, every defeat strengthens your next line of defense.
- 8
The Kings Last Hand
Single-player alternative to Castellan — playable solo, no multiplayer required. Shares Strategy and Indie with Castellan.
The Kingdom is under siege. Gather powerful cards, and build unique defensive strategies to withstand increasingly deadly enemy assaults. Each defeat teaches a lesson. Each victory unlocks new possibilities.