IMHO.

Single-player games like 688(I) Hunter/Killer

Below are 11 single-player Steam games similar to 688(I) Hunter/Killer, 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 688(I) Hunter/Killer page.

Ranked picks

  1. 1
    Sub Command — Steam game cover

    Sub Command

    Single-player alternative to 688(I) Hunter/Killer — playable solo, no multiplayer required. Shares Strategy with 688(I) Hunter/Killer.

    Take charge of the most deadly modern-day submarines in the world - three distinct submarines across two unique and challenging campaigns. Utilize cutting-edge sensor and weapon technology to locate, track and destroy the enemy - even deliver Tomahawk missiles to inland targets.

    2006Strategy3.79 USDSingle-playerSimilar games →
  2. 2
    Fleet Command — Steam game cover

    Fleet Command

    Single-player alternative to 688(I) Hunter/Killer — playable solo, no multiplayer required. Shares Strategy with 688(I) Hunter/Killer.

    International waterways become theaters of war when the world's most formidable maritime powers exchange their fatal blows. With entire fleets at your command, you must strategically deploy vessels from every class - frigate to aircraft to nuclear submarine - to maintain the precarious balance of naval power and gain position for the...

    2006Strategy3.79 USDSingle-playerSimilar games →
  3. 3
    Dangerous Waters — Steam game cover

    Dangerous Waters

    Single-player alternative to 688(I) Hunter/Killer — playable solo, no multiplayer required. Shares Strategy with 688(I) Hunter/Killer.

    S.C.S. - Dangerous Waters allows you total control over multiple air, surface, and submarine platforms in a modern-day naval environment. Take direct control of individual crew stations and also plan and execute combined arms naval strategies from a top-down 'Commanders Eye' perspective.

    2006Strategy14.99 USDSingle-playerSimilar games →
  4. 4
    Morse Depths: WWII — Steam game cover

    Morse Depths: WWII

    Single-player alternative to 688(I) Hunter/Killer — playable solo, no multiplayer required. Shares Strategy with 688(I) Hunter/Killer.

    Take command of a WWII submarine. Master Morse Code to fire torpedoes, defuse mines, and survive the final siege. From 1942 to 1945, every dot and dash is the difference between glory and the ocean floor.

    2026ActionStrategyIndieSingle-playerSimilar games →
  5. 5
    Silent Shark — Steam game cover

    Silent Shark

    Single-player alternative to 688(I) Hunter/Killer — playable solo, no multiplayer required. Shares Strategy with 688(I) Hunter/Killer.

    A tactical, map-based WWII submarine sim set in the Pacific Theater: Approach, intercept, strike unseen, withdraw into the deep. With realistic instruments, a Torpedo Data Computer (TDC), and including a full campaign with missions, patrol zones, radio intel, and more.

    StrategyIndieSimulationSingle-playerSimilar games →
  6. 6
    Silent Hunter® III — Steam game cover

    Silent Hunter® III

    Single-player alternative to 688(I) Hunter/Killer — playable solo, no multiplayer required.

    The king of submarine simulations returns with an all-new 3D engine, new crew command features, and more realistic WWII naval action than ever before. The movie-like graphics and simple, tension-filled gameplay make this the perfect game for the realism fanatic and the casual gamer.

    2008Simulation9.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    Cold Waters — Steam game cover

    Cold Waters

    Single-player alternative to 688(I) Hunter/Killer — playable solo, no multiplayer required. Shares Strategy with 688(I) Hunter/Killer.

    Spiritual Successor to the Microprose Classic “Red Storm Rising”.

    2017StrategyIndieSimulation39.99 USDDeck PlayableSingle-playerSimilar games →
  8. 8
    Battleships and Carriers 2:  1940-1945 — Steam game cover

    Battleships and Carriers 2: 1940-1945

    Single-player alternative to 688(I) Hunter/Killer — playable solo, no multiplayer required. Shares Strategy with 688(I) Hunter/Killer.

    Casual WW2 naval turn-based strategy: attack/defend, search & destroy, build ships, subs and aircraft. Clear & simple combat and move. Fast, re-playable board game style strategy, with 70 unit types. More than 40 missions, death-matches & campaigns (Destroy, Conquer, Defend, Escort, Kill-Them-All).

    2024StrategyIndieSimulation15.99 USDSingle-playerSimilar games →
  9. 9
    Modern Naval Warfare — Steam game cover

    Modern Naval Warfare

    Single-player alternative to 688(I) Hunter/Killer — playable solo, no multiplayer required. Shares Strategy with 688(I) Hunter/Killer.

    Command the silent service. Modern Naval Warfare is the definitive tactical simulation that puts you inside the pressure hull of a Virginia-Class nuclear submarine. This uncompromising tactical simulation offers unparalleled depth in graphics, physics, and authentic combat systems.

    2026StrategySimulationEarly Access59.99 USDSingle-playerSimilar games →
  10. 10
    Command: Modern Operations — Steam game cover

    Command: Modern Operations

    Single-player alternative to 688(I) Hunter/Killer — playable solo, no multiplayer required.

    Command: Modern Operations is the next generation in cross-domain modern wargaming. It enables you to simulate every military engagement from post World War II to the present day and beyond. The scale is primarily tactical/operational, although strategic scale operations are also possible.

    2019Simulation79.99 USDSingle-playerSimilar games →
  11. 11
    Sea Power : Naval Combat in the Missile Age — Steam game cover

    Sea Power : Naval Combat in the Missile Age

    Single-player alternative to 688(I) Hunter/Killer — playable solo, no multiplayer required. Shares Strategy with 688(I) Hunter/Killer.

    From the lead designer of Cold Waters, Sea Power lets you control NATO and Warsaw Pact forces in modern naval conflict campaigns. Use your advanced naval weaponry and sensors to respect rules of engagement and defeat the enemy forces in a tense fight for initiative and air/naval supremacy.

    2024ActionStrategySimulation49.99 USDDeck PlayableSingle-playerSimilar games →