IMHO.

Single-player games like The Demon King's Incursion

Below are 8 single-player Steam games similar to The Demon King's Incursion, 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 The Demon King's Incursion page.

Ranked picks

  1. 1
    Castle Defense Battles — Steam game cover

    Castle Defense Battles

    Single-player alternative to The Demon King's Incursion — playable solo, no multiplayer required. Shares Strategy and Indie with The Demon King's Incursion.

    Castle Defense requires strategic thinking and tactical timing to defend your Castle from an onslaught of evil monsters.

    2022ActionStrategyIndie2.99 USDSingle-playerSimilar games →
  2. 2
    Nightmare Invasion — Steam game cover

    Nightmare Invasion

    Single-player alternative to The Demon King's Incursion — playable solo, no multiplayer required. Shares Strategy and Indie with The Demon King's Incursion.

    Nightmare has set its sights on this world, and as the will of the world, you will rely on cards, tower defenses, and urban construction to destroy Nightmare's invasion in the dream

    2026StrategyIndieCasualSingle-playerSimilar games →
  3. 3
    RealmGuard — Steam game cover

    RealmGuard

    Single-player alternative to The Demon King's Incursion — playable solo, no multiplayer required. Shares Strategy and Indie with The Demon King's Incursion.

    Realmguard is a rogue-like tower defense where every run is a strategic balancing act of expansion and elemental strategy. Expand the map tile by tile, uncover random encounters and hidden rewards, upgrade weapons and combine elemental effects for powerful synergies to survive.

    2026StrategyIndieCasual8.99 USDSingle-playerSimilar games →
  4. 4
    坍塌世界 — Steam game cover

    坍塌世界

    Single-player alternative to The Demon King's Incursion — playable solo, no multiplayer required. Shares Strategy and Indie with The Demon King's Incursion.

    "Collapsing World" is an innovative tower defense game blending deck-building and roguelike mechanics. Recruit unique companions, craft powerful skill decks, and tackle randomized stages. Deep strategy breaks the traditional TD mold—every run is a fresh challenge!

    2026StrategyIndieSimulationFreeSingle-playerSimilar games →
  5. 5
    Break Of Dawn — Steam game cover

    Break Of Dawn

    Single-player alternative to The Demon King's Incursion — playable solo, no multiplayer required. Shares Strategy and Indie with The Demon King's Incursion.

    A hex-grid tower defense deck builder. Every card places a building, every rank is paid for in enemies taken alive or destroyed in battle, and between waves you pick which enemy type joins the army marching on you. Thirty waves, ten lives, and one tower per run that you can crown.

    StrategyIndieCasualSingle-playerSimilar games →
  6. 6
    Skyward Bastion — Steam game cover

    Skyward Bastion

    Single-player alternative to The Demon King's Incursion — playable solo, no multiplayer required. Shares Strategy and Indie with The Demon King's Incursion.

    Skyward Bastion is a roguelite tower defense game set on floating islands. Build and upgrade your defenses, unlock new strategic possibilities, and adapt your run to procedurally expanding maps.

    2026StrategyIndieEarly Access6.99 USDSingle-playerSimilar games →
  7. 7
    March and Conquer — Steam game cover

    March and Conquer

    Single-player alternative to The Demon King's Incursion — playable solo, no multiplayer required. Shares Strategy and Indie with The Demon King's Incursion.

    March and Conquer is a short autobattler game. During the battle, use the skill tree to train units to fight against enemies on the battlefield. Gain gold and mana from wins and train different units and upgrade your army. March across multiple lands and fight fearsome foes!

    2026StrategyIndieCasualSingle-playerSimilar games →
  8. 8
    DOO DOO Town Saver — Steam game cover

    DOO DOO Town Saver

    Single-player alternative to The Demon King's Incursion — playable solo, no multiplayer required. Shares Strategy and Indie with The Demon King's Incursion.

    Defend your town against relentless enemy waves in this top-down action game that combines real-time combat, strategic town upgrades, and tower defense. Recruit powerful soldiers, strengthen your defenses, and survive until the final battle.

    2026ActionStrategyIndie0.99 USDSingle-playerSimilar games →