IMHO.

Single-player games like Air Defender

Below are 8 single-player Steam games similar to Air Defender, 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 Air Defender page.

Ranked picks

  1. 1
    Empires of Black Powder — Steam game cover

    Empires of Black Powder

    Single-player alternative to Air Defender — playable solo, no multiplayer required. Shares Strategy and Indie with Air Defender.

    It’s the Napoleonic era, and you must build the battlefield you fight on. Send Pioneers to gather supplies, expand the local town, and prepare your defenses. Command companies in formation, keep your veterans alive, and carry their experience and upgrades into the next battle.

    2027StrategyIndieEarly AccessSingle-playerSimilar games →
  2. 2
    Radio Commander: Vietnam '64 — Steam game cover

    Radio Commander: Vietnam '64

    Single-player alternative to Air Defender — playable solo, no multiplayer required. Shares Strategy and Indie with Air Defender.

    Use the radio to give commands to the soldiers on the battlefield. Keep track of the situation based on their voice reports only. Lead US platoons to clash with Vietcong in a realistic, innovative approach to the RTS genre. Make hard choices in a narrative driven experience, and face the outcome.

    2019StrategyIndieSimulation19.99 USDDeck PlayableSingle-playerSimilar games →
  3. 3
    Queen,Don't be afraid — Steam game cover

    Queen,Don't be afraid

    Single-player alternative to Air Defender — playable solo, no multiplayer required. Shares Strategy and Indie with Air Defender.

    In this game, you play as the Queen of the Insectoid race, instead of being a righteous messenger. Your objective is to create intricate mazes underground in the city to resist the human soldiers who come to vanquish you!

    StrategyIndieSimulationSingle-playerSimilar games →
  4. 4
    Civitas: World Simulator — Steam game cover

    Civitas: World Simulator

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

    Civitas: World Simulator is a deep historical-fantasy simulation where nations will dynamically rise, fall, and evolve. In this game we model internal forces like ethnicity, culture, language and other inner political struggles. 

    2026StrategySimulationSingle-playerSimilar games →
  5. 5
    Sea Power : Naval Combat in the Missile Age — Steam game cover

    Sea Power : Naval Combat in the Missile Age

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

    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 →
  6. 6
    Ship of the line — Steam game cover

    Ship of the line

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

    Command legendary fleets across 240 years of Age of Sail warfare. 19 historical scenarios — Trafalgar, the Nile, the Armada. Real wind physics, three-layer damage, and full PvP. Your fleet. Your tactics. Your history.

    2026StrategySimulationEarly Access7.19 USDSingle-playerSimilar games →
  7. 7
    War Untold — Steam game cover

    War Untold

    Single-player alternative to Air Defender — playable solo, no multiplayer required. Shares Strategy and Indie with Air Defender.

    War Untold is an RTS wargame spanning both land and air warfare. Employ powerful tanks and devastating airstrikes to punch through the enemy's front line, or dig in with infantry and mortars to withstand an oncoming onslaught. The choice is yours, commander.

    2025StrategyIndieEarly Access1.99 USDSingle-playerSimilar games →
  8. 8
    Remnant Afterglow Tower Defense — Steam game cover

    Remnant Afterglow Tower Defense

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

    This is a creative and challenging real-time strategy tower defense game where players need to constantly expand, build complex battle lines on the map, and fight against groups of enemies. The game has unique rules and beautiful pixel style, with each level filled with tense and exciting battles.

    2027StrategySimulationEarly AccessSingle-playerSimilar games →