Single-player games like Borderline Enigma
Below are 8 single-player Steam games similar to Borderline Enigma, 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 Borderline Enigma page.
Ranked picks
- 1
DarkSpase
Single-player alternative to Borderline Enigma — playable solo, no multiplayer required. Shares Indie and Simulation with Borderline Enigma.
Galaga meets Tie Fighter meets Elite Dangerous. A sci-fi starfighter combat sim with NASA-accurate Keplerian orbits. Voyage across the Solar System with real-time FTL. Engage Dregg swarms in dynamic PvE encounters. Outmaneuver invaders by pushing Newtonian physics to the limit at 150 m/s.
- 2
Starship Simulator
Single-player alternative to Borderline Enigma — playable solo, no multiplayer required. Shares Adventure and Simulation with Borderline Enigma.
Explore a scientifically accurate Milky Way galaxy and discover distant uncharted worlds, while having unrestricted access to every deck of your Magellan Class deep space exploration vessel. Interact with numerous fully simulated ship systems, or simply relax in the bar and watch the stars drift by.
- 3
Eigenstate
Single-player alternative to Borderline Enigma — playable solo, no multiplayer required. Shares Indie and Adventure with Borderline Enigma.
A narrative observatory sim. Operate a research telescope, catalogue what you find, restore the observatory systems, and discover something you weren't meant to see.
- 4
Space Planet Explorer
Single-player alternative to Borderline Enigma — playable solo, no multiplayer required. Shares Indie and Adventure with Borderline Enigma.
One wrong jump ends the mission. Explore 76 real worlds, from Mercury to TRAPPIST-1e, built from NASA data and astronomical research. Manage scarce resources, survey distant worlds, and search for humanity's new home in a science-driven space roguelite where every run could be your last.
- 5
PlanetMars3D: Spirit Mission
Single-player alternative to Borderline Enigma — playable solo, no multiplayer required. Shares Indie and Adventure with Borderline Enigma.
Explore Mars in 3D through real Pancam photographs from NASA's Spirit rover. Glide between images with detail that sharpens as you approach, and skim thousands of rover photos at a glance — manual mode, slideshow, or automated flythrough. Photo credit: JPL / NASA / Cornell / ASU
- 6
Star Squadron
Single-player alternative to Borderline Enigma — playable solo, no multiplayer required. Shares Indie and Simulation with Borderline Enigma.
Star Squadron is a narrative-driven space combat simulator built for maximum immersion. Command your wing with freeform voice recognition and experience a dynamic campaign that calls you by name using our proprietary Voice Mimic System. Don't just play the game—live it.
- 7
Astrobound
Single-player alternative to Borderline Enigma — playable solo, no multiplayer required. Shares Adventure and Simulation with Borderline Enigma.
Survive and explore space in Astrobound! Visit strange planets, encounter cosmic calamities, and keep your crew alive as you journey through the stars in a retro-inspired whimsical space adventure.
- 8
Tin Can
Single-player alternative to Borderline Enigma — playable solo, no multiplayer required. Shares Indie and Simulation with Borderline Enigma.
You've barely managed to escape your exploding spaceship. Now in an old escape pod, you hurtle through space at the mercy of the cosmos. With no knowledge of the pod’s complex systems, your life depends on a technical manual and your own wits. How long can you survive?