IMHO.

Single-player games like Tower Defense: Defender of the Kingdom

Below are 16 single-player Steam games similar to Tower Defense: Defender of the Kingdom, 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 Tower Defense: Defender of the Kingdom page.

Ranked picks

  1. 1
    Towered — Steam game cover

    Towered

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy and Indie with Tower Defense: Defender of the Kingdom.

    Defend the Nexus, run after run. Build under population limits, balance gold and mana, draft augments as you level, and spend gems on a permanent power-up tree in this pixel-art tower defense roguelite.

    StrategyIndieCasualSingle-playerSimilar games →
  2. 2
    Tower Defense Hero — Steam game cover

    Tower Defense Hero

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy and Indie with Tower Defense: Defender of the Kingdom.

    A game combining tower defense and RPG

    2021ActionStrategyIndie2.99 USDSingle-playerSimilar games →
  3. 3
    God of Failure — Steam game cover

    God of Failure

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy and Indie with Tower Defense: Defender of the Kingdom.

    Defend your castle from the orcish chavs, lure them into your traps and destroy them.

    2017StrategyIndieAdventure3.99 USDSingle-playerSimilar games →
  4. 4
    Zenteni — Steam game cover

    Zenteni

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy with Tower Defense: Defender of the Kingdom.

    Build, conquer and collect puzzles.

    2024Strategy19.99 USDSingle-playerSimilar games →
  5. 5
    Castle Combat — Steam game cover

    Castle Combat

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy and Casual with Tower Defense: Defender of the Kingdom.

    RTS, but the soldiers will act automatically: Each soldier has different characteristics/attribute values/action methods. Choose the appropriate soldiers and buildings according to the battlefield situation, and destroy the opponent's castle only through your strategy rather than operation!

    2025StrategyCasual2.99 USDSingle-playerSimilar games →
  6. 6
    Warlords of Archaios Online — Steam game cover

    Warlords of Archaios Online

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy and Indie with Tower Defense: Defender of the Kingdom.

    Command either Humans, Orcs, Undead or Elves in a fantasy factions in a 2D pixel-art real-time strategy game. Build your base & army, gather resources, level up & gear Warlords, conquer bandits, use god powers, and battle AI or rival players online across, natural disaster & weather-struck maps.

    2027StrategyIndieSingle-playerSimilar games →
  7. 7
    GemCraft - Legacy Collection — Steam game cover

    GemCraft - Legacy Collection

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy and Indie with Tower Defense: Defender of the Kingdom.

    Forge and combine magical gems, build deadly defenses, and survive relentless waves in one of the most beloved Flash-era tower defense series! Experience the original three GemCraft games in one collection. GemCraft 1, GemCraft 0, and GemCraft Labyrinth!

    2026StrategyIndieCasualSingle-playerSimilar games →
  8. 8
    GemCraft - Frostborn Wrath — Steam game cover

    GemCraft - Frostborn Wrath

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Strategy and Indie with Tower Defense: Defender of the Kingdom.

    The epic tower defense dark fantasy journey continues! Create powerful gems with various abilities and take on the battle against an endlessly flowing army of monsters, and face the growing darkness as you fight your way back towards the Spiritforge.

    2020ActionStrategyIndie12.99 USDDeck PlayableSingle-playerSimilar games →
  9. 9
    Forklift: Simulator — Steam game cover

    Forklift: Simulator

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Indie with Tower Defense: Defender of the Kingdom.

    Forklift: Simulator is a realistic forklift simulator where you have to carefully transport fragile cargo from one place to another!

    2019IndieSimulationRacing2.99 USDDeck PlayableSingle-playerSimilar games →
  10. 10
    Logistic Expert — Steam game cover

    Logistic Expert

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Indie with Tower Defense: Defender of the Kingdom.

    Logistics Expert is a modern tycoon simulator for managing a logistics company and heavy equipment with realistic physics!

    2019IndieSimulationRacing2.99 USDDeck PlayableSingle-playerSimilar games →
  11. 11
    Ballista Legend — Steam game cover

    Ballista Legend

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Indie and Casual with Tower Defense: Defender of the Kingdom.

    Ballista Legend is a funny action-puzzler with the ballista in beautiful worlds. 100 spectacular levels are wating for you!

    2019IndieCasual2.99 USDSingle-playerSimilar games →
  12. 12
    Parking 3D — Steam game cover

    Parking 3D

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Indie with Tower Defense: Defender of the Kingdom.

    Parking 3D is an amazing car parking simulator where you have to park different cars with highest precision!

    2019IndieSimulationRacing2.99 USDDeck PlayableSingle-playerSimilar games →
  13. 13
    Mahjong: Magic Chips — Steam game cover

    Mahjong: Magic Chips

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Indie and Casual with Tower Defense: Defender of the Kingdom.

    Mahjong: Magic Chips is a sweet board game where you have to destroy all the same tiles as soon as possible!

    2019IndieCasual2.99 USDSingle-playerSimilar games →
  14. 14
    Crossroads Extreme — Steam game cover

    Crossroads Extreme

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Indie and Casual with Tower Defense: Defender of the Kingdom.

    Crossroads Extreme is a cute arcade simulator where you should manage driving traffic in the most accurate way to avoid a car crash and carmageddon!

    2019IndieCasual2.99 USDSingle-playerSimilar games →
  15. 15
    Crafting Block World — Steam game cover

    Crafting Block World

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required. Shares Indie with Tower Defense: Defender of the Kingdom.

    Crafting Block World is an adventure with sandbox elements that will help you build your ideal world!

    2019ActionIndieAdventureFreeSingle-playerSimilar games →
  16. 16
    Elite Soldier: 3D Shooter — Steam game cover

    Elite Soldier: 3D Shooter

    Single-player alternative to Tower Defense: Defender of the Kingdom — playable solo, no multiplayer required.

    Where the special forces can not cope — one soldier and a rifle will achieve the goal.

    2019Action2.99 USDSingle-playerSimilar games →