Single-player games like Mars 2099
Below are 8 single-player Steam games similar to Mars 2099, 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 Mars 2099 page.
Ranked picks
- 1
Mooncall
Single-player alternative to Mars 2099 — playable solo, no multiplayer required. Shares Action with Mars 2099.
A retro arcade rescue game. Fly your ship to save stranded foragers from a crater-scarred moon. Compete with your friends on global or private leaderboards! Don't ask about the red mushrooms.
- 2
Astral Bounty
Single-player alternative to Mars 2099 — playable solo, no multiplayer required. Shares Action with Mars 2099.
Astral Bounty is a demanding 2D arcade side-scroller straight out of the ’90s. Blast through hand-built enemy waves, hunt four bounties, earn credits and blow them on beefy upgrades in the shop. You’re going to need them. 3 difficulty levels, 4 ships, mercy optional.
- 3
ASTROXION
Single-player alternative to Mars 2099 — playable solo, no multiplayer required. Shares Action with Mars 2099.
Pilot a powerful starfighter through an endless alien invasion. Rescue the Cubes, survive relentless alien waves, and chase the ultimate high score in this fast-paced arcade space shooter.
- 4
Project Neon
Single-player alternative to Mars 2099 — playable solo, no multiplayer required. Shares Action with Mars 2099.
Blast through enemy defenses in this intense 16-bit shoot ‘em up (or shmup), dismantling interplanetary shields to bring humanity’s last hope back from Mars and save Earth from ecological collapse.
- 5
Stel
Single-player alternative to Mars 2099 — playable solo, no multiplayer required. Shares Action with Mars 2099.
Stel is a spaceship action-adventure game with procedurally generated elements. Fight dangerous foes, improve your ship and explore the different levels to decipher a mysterious problem, the Quantum are disappearing...
- 6
Exile Squadron
Single-player alternative to Mars 2099 — playable solo, no multiplayer required. Shares Action with Mars 2099.
In this sidescrolling shoot ‘em up, you are the top pilot of the Exile Squadron, who has to stop the invading colonial forces. Unlock and upgrade an array of tactically diverse weapons, complete bonus objectives and compete with other players on the online leaderboards.
- 7
Truxton Extreme
Single-player alternative to Mars 2099 — playable solo, no multiplayer required. Shares Action with Mars 2099.
Take down hordes of alien invaders with your Power Shot, Truxton Beam, Thunder Laser, Homing Shot, Star‑mine Shot, and more! Don't forget to breathe as you face off against gigantic bosses in the ultimate battle for humanity’s survival!
- 8
VOIDRAVE
Single-player alternative to Mars 2099 — playable solo, no multiplayer required. Shares Action with Mars 2099.
A bullet hell shmup with a secret. 100 waves, 20 bosses, and the slow realization that the sector you're purging isn't a sector. You are not crossing the void. You are inside it.