Single-player games like Zero Castle
Below are 8 single-player Steam games similar to Zero Castle, 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 Zero Castle page.
Ranked picks
- 1
Blast Horizon
Single-player alternative to Zero Castle — playable solo, no multiplayer required. Shares Action with Zero Castle.
The Screen Belongs to your Enemy - Take it Back!In this classic Shmup, you will fight through impossible odds against hostiles flooding the battlefield from every direction. Every second is a test of positioning and precision while turning the battlefield into a storm of explosions.
- 2
INSPACE 2980
Single-player alternative to Zero Castle — playable solo, no multiplayer required. Shares Action and Indie with Zero Castle.
INSPACE 2980 is a stylish and dynamic SHMUP from the 16-bit era of games consoles and arcade machines. Take part in an exciting adventure and save the galaxy! Once again!
- 3
SPACEFIGHTER - The Bullet Hell
Single-player alternative to Zero Castle — playable solo, no multiplayer required. Shares Action and Indie with Zero Castle.
Vampire Survivors meets bullet hell — in space. Pilot a 2D starship, fuse weapon branches into broken builds, and survive waves of bullets and bosses with real mechanics. Solo dev project.
- 4
Incrementalism: Paper Space
Single-player alternative to Zero Castle — playable solo, no multiplayer required. Shares Action and Indie with Zero Castle.
A run based shooter drawn on lined paper. Fly a paper ship across a desk, collect what you can before the fuel runs out, then spend it and go again. Five worlds, five currencies, and rules that rewrite themselves.
- 5
Alpha Star
Single-player alternative to Zero Castle — playable solo, no multiplayer required. Shares Action and Indie with Zero Castle.
"Survive the crushing gravity and conquer the void! Alpha Star is a fast-paced 2D space shooter where you must navigate through evolving bullet hells and dynamic black holes. Upgrade your ship, survive 10 intense mission phases, and reach the heart of the Singularity."
- 6
Void Wars
Single-player alternative to Zero Castle — playable solo, no multiplayer required. Shares Action and Indie with Zero Castle.
Dodge, shoot and free the galaxy of the evil space mega corp. Use a variety of different weapons and spaceships, each with different playstyles to overcome many challenging levels.
- 7
Cosmic Warlock
Single-player alternative to Zero Castle — playable solo, no multiplayer required. Shares Action and Indie with Zero Castle.
Wield the power of the stars in this intense multi directional shmup.
- 8
DRUM'N'BASS MASSACRE
Single-player alternative to Zero Castle — playable solo, no multiplayer required. Shares Action with Zero Castle.
DRUM'N'BASS MASSACRE is a high-velocity aerial combat shooter where you destoy your enemies while performing unimaginable maneuvers using your interstellar interceptor, accompanied by original drum and bass soundtrack