IMHO.

Single-player games like SPUM TD

Below are 8 single-player Steam games similar to SPUM TD, 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 SPUM TD page.

Ranked picks

  1. 1
    Eternal 4 Rounds — Steam game cover

    Eternal 4 Rounds

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

    A dynamic low-poly Tower Defense. Command mobile squads and repel attacks from 4 factions. Collect gold from settlements during battle to craft equipment—the currency for hiring new troops. Defeat titanic bosses, upgrade your camp, and unlock elite tiers for your army!

    2027ActionStrategyIndieSingle-playerSimilar games →
  2. 2
    Afterglow Fortress — Steam game cover

    Afterglow Fortress

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

    A cute hand-drawn 2D medieval RTS game. Gather resources, build your base, develop by day, and defend against monster hordes at night to protect your realm.

    StrategyIndieSimulationSingle-playerSimilar games →
  3. 3
    ByteCrawler — Steam game cover

    ByteCrawler

    Single-player alternative to SPUM TD — playable solo, no multiplayer required. Shares Strategy and Casual with SPUM TD.

    Pick a hero, build your swarm, and hold off enemy waves. Place units, watch your energy, and level up to survive in this lane-defense strategy game!

    2026StrategyCasualSingle-playerSimilar games →
  4. 4
    Glowbot Tower Defense — Steam game cover

    Glowbot Tower Defense

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

    Competitive endless sci-fi tower defense game with global leaderboards where you strategically place and upgrade Glowbots to stop waves of enemies across vibrant space maps.

    2026StrategyIndieCasualSingle-playerSimilar games →
  5. 5
    城市塔防-City Tower Defence — Steam game cover

    城市塔防-City Tower Defence

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

    Help defend Shanghai from an invasion of snowmen! Build and upgrade towers across a battlefield that changes every run, shape your strategy with powerful cards and between-wave rewards, and survive escalating waves and boss encounters in this roguelite tower defense.

    2026ActionStrategyIndieSingle-playerSimilar games →
  6. 6
    Towered — Steam game cover

    Towered

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

    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 →
  7. 7
    Stick Wars: The Laneborn — Steam game cover

    Stick Wars: The Laneborn

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

    A 2D stickman strategy game on three lanes: you don’t micro troops you decide gold, deployments, and upgrades. Ally champions, lane-swapping bosses, and a campaign that only gets tougher.

    2027StrategyIndieCasualSingle-playerSimilar games →
  8. 8
    Red Rocket Defencism — Steam game cover

    Red Rocket Defencism

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

    You, a military officer from our great autocratic motherland, must protect our precious rockets from the evil capitalist enemy in this revolutionary base building strategy game. Bribe! Surveil! Purge! Imbibe! The end justifies the means when you have to protect our invaluable rockets!

    2026ActionStrategyIndie7.03 USDSingle-playerSimilar games →