Single-player games like BIO-SUBMARINER DX
Below are 9 single-player Steam games similar to BIO-SUBMARINER DX, 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 BIO-SUBMARINER DX page.
Ranked picks
- 1
Project NEUNLEBEN Alpha Defence Force
Single-player alternative to BIO-SUBMARINER DX — playable solo, no multiplayer required. Shares Action and Indie with BIO-SUBMARINER DX.
An attack by an alien species, emerging from a dimensional rift, has begun! Shoot 'em up your way through 11 levels with the help of the "Alpha Defence Force", consisting of three cybernetically enhanced cats, and defeat screen-sized bosses in this retro 16-bit-inspired Shmup.
- 2
RESHOOTER
Single-player alternative to BIO-SUBMARINER DX — playable solo, no multiplayer required. Shares Action and Indie with BIO-SUBMARINER DX.
RESHOOTER offers heart-pounding shoot-em-up action that elevates classic arcade gameplay to the next level. Dive into the retroflow with electrifying visuals, immersive audio, and captivating mechanics.
- 3
Martian Invaders
Single-player alternative to BIO-SUBMARINER DX — playable solo, no multiplayer required. Shares Action and Indie with BIO-SUBMARINER DX.
WE HAVE ALIENS, YOU DON'T—Blast Martian invaders and flying saucers across 30 stages with robotic voice effects. Use your destructible shield, rescue army men for bonus points, and chase the high score.
- 4
Netherspace
Single-player alternative to BIO-SUBMARINER DX — playable solo, no multiplayer required. Shares Action and Indie with BIO-SUBMARINER DX.
A sci-fi shoot'em'up game with heavy focus on upgrades experimentation, featuring two unlikely heroes that must work perfectly together, despite their share of secrets, to surpass their limits and succeed in eliminating a threat that might destroy both Earth and Andraxia if left unchecked.
- 5
Cosmic Cruiser
Single-player alternative to BIO-SUBMARINER DX — playable solo, no multiplayer required. Shares Action with BIO-SUBMARINER DX.
In this unique shooter from 1984. take on the role of a pilot of an out-dated Cosmic Cruiser, fighting to rescue the crew of a distant space station that had been captured by a raiding party from the sinister Rallom Empire.
- 6
Stop the Saturnians!
Single-player alternative to BIO-SUBMARINER DX — playable solo, no multiplayer required. Shares Action with BIO-SUBMARINER DX.
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!
- 7
Gates of Zendocon
Single-player alternative to BIO-SUBMARINER DX — playable solo, no multiplayer required. Shares Action with BIO-SUBMARINER DX.
In this classic side-scrolling shoot-em-up, originally published in 1989 for the Atari Lynx handheld console, take on the role of a starship pilot trapped in a web of 51 interconnected hostile universes by the evil spider Zendocon.
- 8
Viral Reload EX
Single-player alternative to BIO-SUBMARINER DX — playable solo, no multiplayer required. Shares Action and Indie with BIO-SUBMARINER DX.
Viral Reload EX is a shoot-em-up with a dash mechanic where you shrink down to fight infections at a microscopic scale! Can you defeat the evil Kyle Kaboom before he destroys the moon?
- 9
Mouseman: Point and Click RPG Adventure - Chapter 1
Single-player alternative to BIO-SUBMARINER DX — playable solo, no multiplayer required.
Noir-themed Point and Click RPG Adventure with Turn-based battles! Pickpocket innocent people, eat cheese, rumble with the C.A.T.S., uncover secrets and rise to the top of the criminal underworld to become Top G!