Single-player games like Alien Siege: Earth
Below are 8 single-player Steam games similar to Alien Siege: Earth, 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 Alien Siege: Earth page.
Ranked picks
- 1
Arcadia
Single-player alternative to Alien Siege: Earth — playable solo, no multiplayer required. Shares Action with Alien Siege: Earth.
In this highly addictive top-down arcade shoot-em-up from 1982, originally for the ZX Spectrum, defend yourself from wave upon wave of deadly alien combatants using your Ion Thrust Drive and dual Plasma Disruptors.
- 2
Speglar
Single-player alternative to Alien Siege: Earth — playable solo, no multiplayer required. Shares Action and Indie with Alien Siege: Earth.
Frantic 4-player laser ricocheting top-down shooter. Keep it casual and enjoy the chaos, or master the surprisingly deep mechanics to obliterate your enemies. Duke it out locally in free-for-all or 2v2.
- 3
Gunslinger Nova
Single-player alternative to Alien Siege: Earth — playable solo, no multiplayer required. Shares Action with Alien Siege: Earth.
A top-down, 2d space-shooter that pits the user against swarms of alien ships from other dimensions. Destroy all enemies and portals as fast as possible. Battle increasingly tougher enemies through 40 Campaign levels and Endless Mode!
- 4
PUFIWEHO
Single-player alternative to Alien Siege: Earth — playable solo, no multiplayer required. Shares Action and Indie with Alien Siege: Earth.
Protecting Us From Incredibly Worrisome Extremely Hostile Oddities...is what you will be doing with your football! Defend the Earth from the invading disciples of the Deranged Octopus, and learn the ultimate secret of the Universe.
- 5
Blast'N Bounty
Single-player alternative to Alien Siege: Earth — playable solo, no multiplayer required. Shares Action and Indie with Alien Siege: Earth.
Blast’N Bounty is a vertical scrolling shoot’em up featuring 8 stages players can tackle in the order of their choosing. Cruise through a crazy solar system in a mix of pixel art and low poly 3D with action that’s easy to learn but tough to master!
- 6
Asteranova
Single-player alternative to Alien Siege: Earth — playable solo, no multiplayer required. Shares Action and Casual with Alien Siege: Earth.
Fast-paced vertical scrolling space shooter featuring intense boss battles, challenging enemy waves, and score-driven arcade gameplay.
- 7
GUNPIG: Firepower For Hire
Single-player alternative to Alien Siege: Earth — playable solo, no multiplayer required. Shares Action and Indie with Alien Siege: Earth.
Sci-fi top-down twin-stick shooter with 9 weapons, 3 alts and secret hidden collectibles!
- 8
Stop the Saturnians!
Single-player alternative to Alien Siege: Earth — playable solo, no multiplayer required. Shares Action with Alien Siege: Earth.
Stop the Saturnians is a shooter inspired by classic arcade games. Dodge enemy fire, destroy procedurally generated alien waves and fight massive bosses. Collect resources in the midst of combat to upgrade your ship or improve Earth's defenses. Protect yourself and the planet both!