IMHO.

Co-op games like Crossfire: Sierra Squad

Below are 8 cooperative Steam games similar to Crossfire: Sierra Squad, ranked by player overlap and content similarity. Every pick supports cooperative play — online co-op, LAN co-op, or shared/split-screen — so you can play with friends right out of the box. imho.run pulls from the same Steam category data Valve uses internally, so "Co-op" here matches what the store labels.

Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Crossfire: Sierra Squad page.

Ranked picks

  1. 1
    Zero Caliber 2 Remastered — Steam game cover

    Zero Caliber 2 Remastered

    Online Co-op alternative to Crossfire: Sierra Squad — playable with friends. Shares Action with Crossfire: Sierra Squad.

    Zero Caliber 2 Remastered brings the full VR shooter experience to PC - with intense, cinematic firefights, a full single player and Co-op campaign, PvP, a huge arsenal to unlock, and character customization to make you stand out. Jump in if you’re after a proper VR shooter. Out NOW!

    2025ActionIndieAdventure24.99 USDCo-opSimilar games →
  2. 2
    Zero Caliber VR — Steam game cover

    Zero Caliber VR

    Online Co-op alternative to Crossfire: Sierra Squad — playable with friends. Shares Action and Casual with Crossfire: Sierra Squad.

    Zero Caliber is the ultimate VR FPS: single player/Co-op campaign, PvP and mod support with 40+ realistic firearms & melee weapons, 100+ unlockable skins, 50+ attachments, realistic physics, progression & more! Immerse yourself in the action, customize your gear and unleash your inner hero!

    2023ActionIndieSimulation24.99 USDCo-opSimilar games →
  3. 3
    WARRIORS — Steam game cover

    WARRIORS

    Online Co-op alternative to Crossfire: Sierra Squad — playable with friends. Shares Action with Crossfire: Sierra Squad.

    Warriors is a cutting-edge multiplayer shooter that blends breathtaking realism with adrenaline-pumping action. Designed for players of all skill levels, it offers the flexibility to battle against real players or challenge advanced AI bots in single-player mode. The game boasts seven game modes.

    2025ActionEarly Access17.99 USDCo-opSimilar games →
  4. 4
    Tactical Assault VR — Steam game cover

    Tactical Assault VR

    Online Co-op alternative to Crossfire: Sierra Squad — playable with friends. Shares Action with Crossfire: Sierra Squad.

    Tactical Assault VR is an intense tactical shooter where you use real-world CQB (Close Quarters Battles) tactics to stack up, breach doors and eliminate threats. Play solo or join an online co-op special forces unit in missions around the world.

    2023ActionSimulationEarly Access17.99 USDCo-opSimilar games →
  5. 5
    GW: Legacy — Steam game cover

    GW: Legacy

    Online Co-op alternative to Crossfire: Sierra Squad — playable with friends. Shares Action with Crossfire: Sierra Squad.

    A Realistic, Physics Based, Multiplayer shooter game in VR. Experience Physical hands, and Guns that are calibrated to real life.

    2023ActionAdventureSimulation15.99 USDCo-opSimilar games →
  6. 6
    War Dust VR: 32v32 Battlefields — Steam game cover

    War Dust VR: 32v32 Battlefields

    Online Co-op alternative to Crossfire: Sierra Squad — playable with friends. Shares Action with Crossfire: Sierra Squad.

    Join the fight in War Dust VR, the ultimate FPS shooter with immersive VR gameplay. Dominate expansive battlefields with diverse vehicles, exciting mechanics, and strategic control points. Join your team and become a champion of this multiplayer war today!

    2020ActionIndieSimulation24.99 USDCo-opSimilar games →
  7. 7
    Out of Ammo — Steam game cover

    Out of Ammo

    Online Co-op alternative to Crossfire: Sierra Squad — playable with friends. Shares Action with Crossfire: Sierra Squad.

    Out of Ammo is an intense VR Tower Defense / FPS hybrid strategy game that will have you constructing defenses, calling in artillery, issuing orders, and taking direct control of your soldiers in order to survive a relentless enemy onslaught.

    2016ActionStrategyIndie9.99 USDCo-opSimilar games →
  8. 8
    Pavlov — Steam game cover

    Pavlov

    Online Co-op alternative to Crossfire: Sierra Squad — playable with friends. Shares Action with Crossfire: Sierra Squad.

    Pavlov is a multiplayer shooter in VR with heavy focus on community features. Realistic reloading features and fast paced combat as part of the core experience. Play the #1 most popular VR shooter on PC today.

    2024ActionIndie24.99 USDCo-opSimilar games →