IMHO.

Single-player games like Mercury

Below are 7 single-player Steam games similar to Mercury, 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 Mercury page.

Ranked picks

  1. 1
    Glory to Ukraine! — Steam game cover

    Glory to Ukraine!

    Single-player alternative to Mercury — playable solo, no multiplayer required. Shares Action and Indie with Mercury.

    On 24 February, Russia invaded Ukraine in an escalation of the Russo-Ukrainian War. Your task is kill the invaders. Use any available weapons: knive and axe, machine gun and grenades. Be careful, enemies are crafty and merciless. The fate of Ukraine depends on you.

    2024ActionIndieAdventure1.99 USDSingle-playerSimilar games →
  2. 2
    Call of Duty®: Black Ops — Steam game cover

    Call of Duty®: Black Ops

    Single-player alternative to Mercury — playable solo, no multiplayer required. Shares Action with Mercury.

    The biggest first-person action series of all time and the follow-up to critically acclaimed Call of Duty®: Modern Warfare 2 returns with Call of Duty®: Black Ops.

    2010Action39.99 USDDeck PlayableSingle-playerSimilar games →
  3. 3
    Call of Duty®: Black Ops — Steam game cover

    Call of Duty®: Black Ops

    Single-player alternative to Mercury — playable solo, no multiplayer required. Shares Action with Mercury.

    The biggest first-person action series of all time and the follow-up to critically acclaimed Call of Duty®: Modern Warfare 2 returns with Call of Duty®: Black Ops.

    2010Action39.99 USDDeck PlayableSingle-playerSimilar games →
  4. 4
    PunjiVR: The Vietnam War — Steam game cover

    PunjiVR: The Vietnam War

    Single-player alternative to Mercury — playable solo, no multiplayer required. Shares Action and Indie with Mercury.

    PunjiVR is an unforgiving tactical shooter set during the Vietnam War. Gameplay is non-linear, replayable, and intense. This is not just "another VR shooter" or a tech demo. The jungle wants you dead, will you give in?

    2022ActionStrategyIndie16.99 USDSingle-playerSimilar games →
  5. 5
    Vietnam War — Steam game cover

    Vietnam War

    Single-player alternative to Mercury — playable solo, no multiplayer required. Shares Action with Mercury.

    Open world single-player FPS. Command your squad in battle across jungles, hills and villages of Vietnam. Fight as U.S or Vietcong. Vast arsenal of weapons and 50+ vehicles

    2025ActionEarly Access14.99 USDDeck PlayableSingle-playerSimilar games →
  6. 6
    Battlefield™ 6 — Steam game cover

    Battlefield™ 6

    Single-player alternative to Mercury — playable solo, no multiplayer required. Shares Action with Mercury.

    The ultimate all-out warfare experience. In a war of tanks, fighter jets, and massive combat arsenals, your squad is the deadliest weapon.

    2025Action41.99 USDSingle-playerSimilar games →
  7. 7
    Call of Duty® 2 — Steam game cover

    Call of Duty® 2

    Single-player alternative to Mercury — playable solo, no multiplayer required. Shares Action with Mercury.

    Call of Duty® 2 redefines the cinematic intensity and chaos of battle as seen through the eyes of ordinary soldiers fighting together in epic WWII conflicts. The sequel to 2003's Call of Duty, winner of over 80 Game of the Year awards, Call of Duty 2 offers more immense, more intense, more realistic battles than ever before, thanks to...

    2006Action19.99 USDDeck PlayableSingle-playerSimilar games →