IMHO.

Single-player games like Submarine War

Below are 8 single-player Steam games similar to Submarine War, 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 Submarine War page.

Ranked picks

  1. 1
    Morse Depths: WWII — Steam game cover

    Morse Depths: WWII

    Single-player alternative to Submarine War — playable solo, no multiplayer required. Shares Action and Strategy with Submarine War.

    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 →
  2. 2
    Sovereign Strike: Submarine Supremacy — Steam game cover

    Sovereign Strike: Submarine Supremacy

    Single-player alternative to Submarine War — playable solo, no multiplayer required. Shares Action and Strategy with Submarine War.

    Become the captain of a Los Angeles-class attack submarine. Strike without warning, sink enemy ships with different torpedoes, dominate the global rankings, and explore a living underwater world packed with historical wrecks and forgotten secrets. Fast, tactical, and fun submarine warfare.

    2026ActionStrategySimulationSingle-playerSimilar games →
  3. 3
    Nuclear Sub: Prologue — Steam game cover

    Nuclear Sub: Prologue

    Single-player alternative to Submarine War — playable solo, no multiplayer required.

    The Prologue is just part of the gameplay that awaits you in the full version of the game. A realistic nuclear submarine simulator will allow you to take command of your crew and battle your fiercest enemies. Arm yourself with missiles, dive into the ocean and fight for your country

    2026Free To PlayFreeSingle-playerSimilar games →
  4. 4
    Silent Depth 2: Pacific — Steam game cover

    Silent Depth 2: Pacific

    Single-player alternative to Submarine War — playable solo, no multiplayer required. Shares Action and Strategy with Submarine War.

    Silent Depth 2: Pacific is a lite sub-sim. You enter the Silent Service at the command of a Gato class submarine on War Patrols during World War 2. How long will you survive, and ultimately how much tonnage you sink is down to skill and cunning.

    2024ActionStrategySimulation12.99 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    Modern Naval Warfare — Steam game cover

    Modern Naval Warfare

    Single-player alternative to Submarine War — playable solo, no multiplayer required. Shares Strategy and Simulation with Submarine War.

    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 →
  6. 6
    Submarine Titans — Steam game cover

    Submarine Titans

    Single-player alternative to Submarine War — playable solo, no multiplayer required. Shares Strategy and Simulation with Submarine War.

    Submarine Titans is a real-time strategy video game that takes place in the year 2115 after a comet has struck Earth, driving two human factions, the militant White Sharks and the scientific Black Octopi, to establish underwater bases and fight for dominance over the oceans.

    2020StrategySimulation4.99 USDSingle-playerSimilar games →
  7. 7
    Darkwater — Steam game cover

    Darkwater

    Single-player alternative to Submarine War — playable solo, no multiplayer required. Shares Action and Strategy with Submarine War.

    Darkwater is a cooperative extraction horror game for 1-4 players. Command a submarine trapped under the ice of an alien planet. Battle enemy vessels and deep sea abominations as you hunt for resources. Do what it takes to survive.

    2026ActionStrategyIndie9.99 USDDeck PlayableSingle-playerSimilar games →
  8. 8
    IronWolf VR — Steam game cover

    IronWolf VR

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

    IronWolf VR is a roomscale submarine game playable either singleplayer or online co-op with motion controls. Built from the ground up for VR, each part of the submarine has been crafted for an optimal VR experience.

    2022ActionIndieSimulation19.99 USDDeck PlayableSingle-playerSimilar games →