Single-player games like Castella
Below are 8 single-player Steam games similar to Castella, 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 Castella page.
Ranked picks
- 1
Deck Defense
Single-player alternative to Castella — playable solo, no multiplayer required. Shares Strategy and Casual with Castella.
Tower defense meets deck building in Deck Defense. Defending against the blobs is no easy feat. Will you prioritise fortifying your tower defenses or expanding the map? Build your deck with over 75 cards to choose from.
- 2
Wandering Monolith: Rogue TD
Single-player alternative to Castella — playable solo, no multiplayer required. Shares Strategy and Casual with Castella.
You are the Wandering Monolith, falling from the sky. Summon towers, expand the board, defend your core, and build your deck of upgrades to conquer countless worlds.
- 3
NO ENTRY: OUR BURROW
Single-player alternative to Castella — playable solo, no multiplayer required. Shares Action and Strategy with Castella.
A roguelite incremental game where you fight by linking animals.
- 4
坍塌世界
Single-player alternative to Castella — playable solo, no multiplayer required. Shares Strategy with Castella.
"Collapsing World" is an innovative tower defense game blending deck-building and roguelike mechanics. Recruit unique companions, craft powerful skill decks, and tackle randomized stages. Deep strategy breaks the traditional TD mold—every run is a fresh challenge!
- 5
Imaginytes
Single-player alternative to Castella — playable solo, no multiplayer required. Shares Strategy with Castella.
Tower defense meets roguelite deckbuilder! Collect, summon and evolve your Imaginyte creatures, and use them to create intricate mazes to defeat the nightmares.
- 6
Legacy of Defense
Single-player alternative to Castella — playable solo, no multiplayer required. Shares Strategy and Casual with Castella.
Become the hero who protects the fantasy world and stop the monster invasion! 'Legacy of Defense' combines defense with deck-building. Build your deck, use powerful skills, gain experience, upgrade, clear stages, and defeat the final boss. Ready to test your strategy and luck?
- 7
Rogue Kingdoms
Single-player alternative to Castella — playable solo, no multiplayer required. Shares Action and Strategy with Castella.
Classic tower defense meets roguelike adventure where you control the hero! Dive into procedurally generated levels filled with unique waves of enemies. Create powerful synergies with a variety of game-changing skills, relics, weapons, and traits to defend your kingdom. Every run is a new challenge!
- 8
Defense of Kyrath
Single-player alternative to Castella — playable solo, no multiplayer required. Shares Strategy and Casual with Castella.
Tower defense meets roguelike in a fantasy kingdom. Position 9 wardens across enchanted forests, pastoral meadows, and volcanic badlands. 30+ enemies with resistances and weaknesses. A talent tree for meaningful progression. Climb the Folly - a 20-tier roguelike ascent. Kyrath will not fall.