Single-player games like Neonis
Below are 9 single-player Steam games similar to Neonis, 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 Neonis page.
Ranked picks
- 1

Solitary Sentinel
Single-player alternative to Neonis — playable solo, no multiplayer required. Shares Action and Indie with Neonis.
Welcome to Solitary Sentinel, a captivating modern reimagination of Space Invaders and Missile Command, where you must defend against constantly evolving enemies by upgrading a single Sentinel. Enjoy simple controls, and deep strategic gameplay as you fend off the relentless onslaught!
- 2

Gunslinger Nova
Single-player alternative to Neonis — playable solo, no multiplayer required. Shares Action with Neonis.
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!
- 3

XenoFeud
Single-player alternative to Neonis — playable solo, no multiplayer required. Shares Action and Indie with Neonis.
XenoFeud is an insane top-down twin-stick arcade alien shooter, where you must survive hordes of alien intruders while defending a mysterious object in space.
- 4

Scramble All Fighters
Single-player alternative to Neonis — playable solo, no multiplayer required. Shares Indie with Neonis.
Amazing graphics. Countless different units. An addictive Battle Pass. We have none of those things. Just one carrier and as many tiny fighters as you can muster to hold back hordes of enemy fighters and bombers. Victory is not enough - you may win the battle, but still lose the war!
- 5

Spelp
Single-player alternative to Neonis — playable solo, no multiplayer required. Shares Action and Indie with Neonis.
The SPELP program needs YOU to annihilate thousands of aliens with a variety of weapons, members and unique capacities. Unlock characters and make up your own team to fit your playstyle.
- 6

Speglar
Single-player alternative to Neonis — playable solo, no multiplayer required. Shares Action and Indie with Neonis.
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.
- 7

I, AI
Single-player alternative to Neonis — playable solo, no multiplayer required. Shares Action and Indie with Neonis.
Classic scrolling shooter with modern graphics. You are self-aware AI. You were created on space military station developing weapons. Now your goal is to break out of the lab and win your freedom.
- 8

Cosmic Ray
Single-player alternative to Neonis — playable solo, no multiplayer required. Shares Action and Indie with Neonis.
A game about exploring space in search of hospitable planets for colonization. Casual gameplay and short rounds make it a great option for killing a few minutes.
- 9

Finding Xavier
Single-player alternative to Neonis — playable solo, no multiplayer required. Shares Indie with Neonis.
A short adventure in which you will have to use precise platforming in order to find your cat, Xavier.