Single-player games like Prime Directive
Below are 10 single-player Steam games similar to Prime Directive, 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 Prime Directive page.
Ranked picks
- 1
The Future Project
Single-player alternative to Prime Directive — playable solo, no multiplayer required. Shares Action and Indie with Prime Directive.
Take control of an AI soldier, explore planets, and partake in fast paced combat in The Future Project, a first person metroidvania. Explore distinct worlds, obtain new weapons and abilities, and defeat powerful enemies in humanity's quest to journey the stars.
- 2
Gemini: Binary Conflict
Single-player alternative to Prime Directive — playable solo, no multiplayer required. Shares Action and Indie with Prime Directive.
‘Gemini: Binary Conflict’ is a multiplayer, class based, first person shooter set in the midst of an interplanetary war. The game features a colourful visual style, unconventional weaponry, equipment, armour, class roles and modes, to provide a subtle mix of familiar and unusual game mechanics.
- 3
System Critical: The Race Against Time
Single-player alternative to Prime Directive — playable solo, no multiplayer required. Shares Action and Adventure with Prime Directive.
Fun and challenging retro style run and gun platform shooter. Blast your arm cannon, use grenades, shields, and melee weapons, dodge projectiles and make your way through the carefully crafted levels. Discover secret areas and destroy objects while navigating obstacles and defeat bosses to progress
- 4
Alien Life Lab
Single-player alternative to Prime Directive — playable solo, no multiplayer required. Shares Action and Indie with Prime Directive.
Giedi Satellite takes a job as a wildlife handler on a colossal nature preserve space station that goes awry in comedic and horrific fashion. Become an Alien Wildlife Control Specialist in this horromedy adventure.
- 5
Alien Weapon Test Grounds
Single-player alternative to Prime Directive — playable solo, no multiplayer required. Shares Action and Indie with Prime Directive.
Alien weapons with unique physics await in this fast-paced FPS. Battle waves of enemies across diverse landscapes, lighting, and weather. Beware the unstable space-time continuum.
- 6
Exophobia
Single-player alternative to Prime Directive — playable solo, no multiplayer required. Shares Action and Indie with Prime Directive.
Explore and fight your way through a crashed human spaceship infested with relentless hordes of aliens as you become more powerful with exciting weapon upgrades and powerups in this retro inspired first-person shooter.
- 7
Frogmonster
Single-player alternative to Prime Directive — playable solo, no multiplayer required. Shares Action and Indie with Prime Directive.
Discover some of the most charming and challenging soulslike bosses in Frogmonster, a Metroidvania FPS adventure where you explore a lively world filled with creatures, bugs, and beasts.
- 8
Silica
Single-player alternative to Prime Directive — playable solo, no multiplayer required. Shares Action and Indie with Prime Directive.
Silica blends FPS and RTS in epic, photorealistic battles. Choose to fight on the ground or command from above as humans or aliens. Dive into thrilling multiplayer combat or master strategic command. Are you ready to survive and conquer?
- 9
Marty Thinks 4D
Single-player alternative to Prime Directive — playable solo, no multiplayer required. Shares Indie with Prime Directive.
Marty Thinks 4D is an isometric 3D puzzle platformer where you play as a small robot on a journey to find his creator. With the aid of time travel, Marty is able to step into the past and work together with past versions of himself to overcome any challenge.
- 10
Great Harvester
Single-player alternative to Prime Directive — playable solo, no multiplayer required. Shares Simulation with Prime Directive.
After your husband’s murder, the Devil shows up with a deal you can’t refuse. So if you want revenge, it looks like soul harvesting season has just begun. Farm by day, kill by night, and don’t get caught. Congratulations! You’re now the town’s serial killer.