Single-player games like Project NEUNLEBEN Alpha Defence Force
Below are 8 single-player Steam games similar to Project NEUNLEBEN Alpha Defence Force, 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 Project NEUNLEBEN Alpha Defence Force page.
Ranked picks
- 1
Astral Bounty
Single-player alternative to Project NEUNLEBEN Alpha Defence Force — playable solo, no multiplayer required. Shares Action and Indie with Project NEUNLEBEN Alpha Defence Force.
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.
- 2
The Last Sideran
Single-player alternative to Project NEUNLEBEN Alpha Defence Force — playable solo, no multiplayer required. Shares Action and Indie with Project NEUNLEBEN Alpha Defence Force.
A hand-drawn 2D arcade shoot 'em up following Zenia, the last Sideran. Dodge the Spikes, gather star essence, unlock ships with distinct weapons, and chase high scores through escalating runs.
- 3
Dungeon Killer
Single-player alternative to Project NEUNLEBEN Alpha Defence Force — playable solo, no multiplayer required. Shares Action and Indie with Project NEUNLEBEN Alpha Defence Force.
Dungeon Killer is a fast-paced boss rush shoot ’em up where you play as Astrid, a woman determined to bargain with the goddess of death herself to resurrect her husband. Armed with a minigun, you’ll descend into a hellish dungeon and face deadly, disturbing female enemies.
- 4
Spacewing War 2
Single-player alternative to Project NEUNLEBEN Alpha Defence Force — playable solo, no multiplayer required. Shares Indie with Project NEUNLEBEN Alpha Defence Force.
Jump into this new battle in this new side-scrolling shoot’em-up, face enemies and obstacles from every corner of the Milkdromeda Galaxy and encounter strange fun transformations that change the way the game plays.
- 5
Super Wiloo Deluxe
Single-player alternative to Project NEUNLEBEN Alpha Defence Force — playable solo, no multiplayer required. Shares Action and Indie with Project NEUNLEBEN Alpha Defence Force.
You are Wiloo, and a lonely alien known as Dr. ETvaldo has kidnapped your dog! Now only you can save your best friend! This game is the Deluxe version of "WILOO" and "Super Wiloo Demake," rebuilt using current codebase, featuring updated pixelated graphics and many improvements!
- 6
Godspeed Gunslinger
Single-player alternative to Project NEUNLEBEN Alpha Defence Force — playable solo, no multiplayer required. Shares Action and Indie with Project NEUNLEBEN Alpha Defence Force.
Fast-paced run-n-gun action platformer with a heavy emphasis on momentum and speed. Are you a bad enough dude to rocket jump and shotgun blast your way to the top of the TOWER OF THE DYING SUN?
- 7
Gravitaws
Single-player alternative to Project NEUNLEBEN Alpha Defence Force — playable solo, no multiplayer required. Shares Action and Indie with Project NEUNLEBEN Alpha Defence Force.
Gravitaws is a retro-style stage shooter inspired by Jaws (NES). Explore a dynamic overworld map. Collect research materials and upgrades, while evading an Alien invader. The story is delivered in classic style cutscenes. Fight bosses, survive, collect, fish, and bomb your way to victory.
- 8
VectaGuard
Single-player alternative to Project NEUNLEBEN Alpha Defence Force — playable solo, no multiplayer required. Shares Action and Indie with Project NEUNLEBEN Alpha Defence Force.
Arcade-inspired shmup action where neon vector caverns explode with modern visuals, dynamic music, weapon upgrades and intense score chasing.