IMHO.

Games like Prime Directive

If Prime Directive is your kind of game, the closest matches are The Future Project, Gemini: Binary Conflict and System Critical: The Race Against Time — picked from the ranked list below. Each pick is ranked by what players of this game also play, shared genres and tags, and review-mined similarity — not a generic popularity list.

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About Prime Directive: Prime Directive is a first person 3D action-adventure shooter in which players control Marty, a small but brave robot. Marty acquires unique abilities to fight enemies and solve puzzles while exploring a mysterious alien world.

2023ActionIndieAdventureSimulation9.99 USDWindowsby Jonathan Stoffer
Prime Directive — Steam game cover

Players who liked Prime Directive also play

Steam players who put hours into Prime Directive also tend to own these titles — a signal called collaborative filtering. imho.run cross-references millions of library ownership patterns to surface games whose real audiences overlap, regardless of whether their genre tags match.

  1. The Future Project

    WHY THIS

    Top pick for Prime Directive fans by collaborative filtering across millions of Steam libraries. 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.

    2023ActionIndieAdventure9.99 USDSteam ↗
  2. Gemini: Binary Conflict

    WHY THIS

    Second-strongest match for Prime Directive fans by collaborative filtering across millions of Steam libraries. 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.

    2024ActionIndieFree To PlayFreeSteam ↗
  3. System Critical: The Race Against Time

    WHY THIS

    Third-strongest match for Prime Directive fans by collaborative filtering across millions of Steam libraries. 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

    2022ActionAdventure4.99 USDSteam ↗
  4. Alien Life Lab

    WHY THIS

    Ranked #4 for Prime Directive fans by collaborative filtering across millions of Steam libraries. 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.

    2022ActionIndieAdventure4.99 USDSteam ↗
  5. Alien Weapon Test Grounds

    WHY THIS

    Ranked #5 for Prime Directive fans by collaborative filtering across millions of Steam libraries. 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.

    2024ActionIndieEarly AccessSteam ↗
  6. Exophobia

    WHY THIS

    Ranked #6 for Prime Directive fans by collaborative filtering across millions of Steam libraries. 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.

    2024ActionIndieAdventure14.99 USDDeck VerifiedSteam ↗
  7. Frogmonster

    WHY THIS

    Ranked #7 for Prime Directive fans by collaborative filtering across millions of Steam libraries. 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.

    2024ActionIndieAdventure19.99 USDDeck PlayableSteam ↗
  8. Silica

    WHY THIS

    Ranked #8 for Prime Directive fans by collaborative filtering across millions of Steam libraries. 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?

    2023ActionStrategyIndie19.99 USDDeck PlayableSteam ↗

Cheaper alternatives

Games in the same vein priced at least 40% below Prime Directive at current Steam store prices.

  1. Garry's Mod

    WHY THIS

    Priced ~50% under Prime Directive on Steam right now. Shares Indie and Simulation with Prime Directive.

    Garry's Mod is a physics sandbox. There aren't any predefined aims or goals. We give you the tools and leave you to play.

    2006IndieSimulationCasual4.99 USDDeck PlayableSteam ↗
  2. Vampire Survivors

    WHY THIS

    Priced ~50% under Prime Directive on Steam right now. Shares Action and Indie with Prime Directive.

    Mow down thousands of night creatures and survive until dawn! Vampire Survivors is a gothic horror casual game with rogue-lite elements, where your choices can allow you to quickly snowball against the hundreds of monsters that get thrown at you. Be the bullet hell!

    2022ActionIndieRPG4.99 USDDeck VerifiedSteam ↗
  3. Titanfall® 2

    WHY THIS

    Priced ~55% under Prime Directive on Steam right now. Shares Action with Prime Directive.

    Respawn Entertainment gives you the most advanced titan technology in its new, single player campaign & multiplayer experience. Combine & conquer with new titans & pilots, deadlier weapons, & customization and progression systems that help you and your titan flow as one unstoppable killing force.

    2020Action4.49 USDDeck PlayableSteam ↗
  4. Cookie Clicker

    WHY THIS

    Priced ~50% under Prime Directive on Steam right now. Shares Indie and Simulation with Prime Directive.

    An idle game about making cookies! Originally released in 2013 on the web, and actively developed since then. This is the official version for Steam.

    2021StrategyIndieSimulation4.99 USDDeck PlayableSteam ↗
  5. WEBFISHING

    WHY THIS

    Priced ~50% under Prime Directive on Steam right now. Shares Indie with Prime Directive.

    WEBFISHING a multiplayer chatroom-focused fishing game! Relax and fish (on the web!)

    2024IndieMassively MultiplayerCasual4.99 USDSteam ↗
  6. POSTAL 2

    WHY THIS

    Priced ~90% under Prime Directive on Steam right now. Shares Action and Indie with Prime Directive.

    Live a week in the life of "The POSTAL Dude"; a hapless everyman just trying to check off some chores. Buying milk, returning an overdue library book, getting Gary Coleman's autograph, what could possibly go wrong?

    2012ActionIndieAdventure0.99 USDDeck VerifiedSteam ↗
  7. Buckshot Roulette

    WHY THIS

    Priced ~70% under Prime Directive on Steam right now. Shares Action and Indie with Prime Directive.

    Play Russian roulette with a 12-gauge shotgun. Four enter. One leaves. Roll the dice with your life. Good luck!

    2024ActionIndieSimulation2.99 USDDeck PlayableSteam ↗
  8. Brotato

    WHY THIS

    Priced ~50% under Prime Directive on Steam right now. Shares Action and Indie with Prime Directive.

    Brotato is a top-down arena shooter roguelite where you play a potato wielding up to 6 weapons at a time to fight off hordes of aliens. Choose from a variety of traits and items to create unique builds and survive until help arrives.

    2023ActionIndieRPG4.99 USDDeck VerifiedSteam ↗

Free alternatives

Free-to-play games that recommended players of this title also tend to enjoy.

  1. Life is Strange - Episode 1

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Adventure with Prime Directive.

    Episode 1 now FREE! Life is Strange is an award-winning and critically acclaimed episodic adventure game that allows the player to rewind time and affect the past, present and future.

    2015ActionAdventureFreeDeck PlayableSteam ↗
  2. Ultimate Custom Night

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with Prime Directive.

    Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!

    2018ActionIndieFree To PlayFreeSteam ↗
  3. ENA: Dream BBQ

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie and Adventure with Prime Directive.

    Experience surreal environments and inexplicable characters as ENA in a new wild world.

    2025IndieAdventureFreeDeck VerifiedSteam ↗
  4. Indigo Park: Chapter 1

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with Prime Directive.

    Explore the abandoned childhood wonder of Indigo Park! Guided by Rambley the Raccoon, help restore power to the destroyed amusement park while you run from the reason it shut down.

    2024ActionIndieAdventureFreeDeck PlayableSteam ↗
  5. STRAFTAT

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Prime Directive.

    STRAFTAT is a 1v1/2v2 ONLINE first person SHOOTER with quick rounds in over 350 MAPS ; Including all WEAPONS, proximity chat and 4 players FFA.

    2024ActionFreeDeck PlayableSteam ↗
  6. The Looker

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with Prime Directive.

    You wake up, alone, on a strangely familiar island full of puzzles that will frustrate and annoy you.

    2022IndieFreeDeck PlayableSteam ↗
  7. Counter-Strike:Global Offensive

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with Prime Directive.

    Counter-Strike:Global Offensive (CS:GO) expands upon the team-based action gameplay that it pioneered when it was launched over 2 decades ago. CS:GO features new maps, characters, weapons, and game modes, and delivers updated versions of the classic CS content (de_dust2, etc.).

    2012ActionFree To PlayFreeDeck PlayableSteam ↗
  8. The Expendabros

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with Prime Directive.

    The Expendabros have assembled and set their sights on the forces of ruthless arms dealer Conrad Stonebanks in the forests of Eastern Europe.

    2014ActionIndieAdventureFreeDeck VerifiedSteam ↗

Frequently asked about Prime Directive

How much does Prime Directive cost?
Prime Directive is listed on Steam at 9.99 USD (current store price; Steam sales may reduce this temporarily).
Does Prime Directive have multiplayer or co-op?
Yes — Prime Directive supports multi-player play according to its Steam store listing (Multi-player, Shared/Split Screen PvP, PvP).
What games are most similar to Prime Directive?
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside Prime Directive are The Future Project, Gemini: Binary Conflict, System Critical: The Race Against Time.
Who developed Prime Directive?
Prime Directive was developed by Jonathan Stoffer and published by KittySoft Studios.

imho.run ranks Steam game alternatives using a mix of collaborative filtering (ALS / iALS / EASE / LightGCN), content scoring over genres, categories, Steam tags, developers, and publishers, plus AI-extracted vibes mined from review text. The page above is generated in seed mode anchored on Prime Directive.

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