IMHO.

Single-player games like Swarm Survivor: Endless Siege

Below are 9 single-player Steam games similar to Swarm Survivor: Endless Siege, 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 Swarm Survivor: Endless Siege page.

Ranked picks

  1. 1
    Screen Survivors — Steam game cover

    Screen Survivors

    Single-player alternative to Swarm Survivor: Endless Siege — playable solo, no multiplayer required. Shares Strategy and Casual with Swarm Survivor: Endless Siege.

    An idle survivor-like that sits in the corner of your screen.

    2026StrategySimulationCasualSingle-playerSimilar games →
  2. 2
    Abyss Horde — Steam game cover

    Abyss Horde

    Single-player alternative to Swarm Survivor: Endless Siege — playable solo, no multiplayer required. Shares Strategy and Indie with Swarm Survivor: Endless Siege.

    Darkness tears reality apart. Hordes of beasts, monsters, and abyssal demons surge from the depths mindless, driven only by destruction. Adventurer, the line needs you! In 《Abyss Horde》, defend against ever-stronger waves. Every run builds a new defense; every upgrade shifts the tide.

    2026ActionStrategyIndieSingle-playerSimilar games →
  3. 3
    HordeFall — Steam game cover

    HordeFall

    Single-player alternative to Swarm Survivor: Endless Siege — playable solo, no multiplayer required. Shares Strategy and Indie with Swarm Survivor: Endless Siege.

    A bulletheaven x incremental game that runs as a desktop companion in the corner of your screen! While you work, your hero automatically fights thousands of enemies. Unlock upgrades and manage your economy, attributes, and spells. Your screen is your battlefield - minimal space, maximum progress!

    ActionStrategyIndieSingle-playerSimilar games →
  4. 4
    Incrempire — Steam game cover

    Incrempire

    Single-player alternative to Swarm Survivor: Endless Siege — playable solo, no multiplayer required. Shares Strategy and Indie with Swarm Survivor: Endless Siege.

    Defend. Upgrade. Dominate. A relaxing incremental base-defense game, packed with powerful skills and a deep skill tree.

    2026ActionStrategyIndie5.99 USDSingle-playerSimilar games →
  5. 5
    Aleef: Desktop Pet Collector — Steam game cover

    Aleef: Desktop Pet Collector

    Single-player alternative to Swarm Survivor: Endless Siege — playable solo, no multiplayer required. Shares Strategy and Indie with Swarm Survivor: Endless Siege.

    Work, browse, or play other games while hatching eggs in the background! Collect 300+ pets with various stats, unlock powerful upgrades, and build your battle team.

    2026StrategyIndieRPGSingle-playerSimilar games →
  6. 6
    Emojis vs Zombies — Steam game cover

    Emojis vs Zombies

    Single-player alternative to Swarm Survivor: Endless Siege — playable solo, no multiplayer required. Shares Strategy and Indie with Swarm Survivor: Endless Siege.

    Emojis vs Zombies is an Idle Desktop Companion Zombie Defense Game! Open packs, Collect Emoji Defenders, Upgrade your squad or base and survive endless waves even while you're AFK or working!

    ActionStrategyIndieSingle-playerSimilar games →
  7. 7
    Loop Tower — Steam game cover

    Loop Tower

    Single-player alternative to Swarm Survivor: Endless Siege — playable solo, no multiplayer required. Shares Indie and RPG with Swarm Survivor: Endless Siege.

    Loop Tower tells the story of adventurers climbing an endless tower. Place it on a corner of your desktop and help them continue their ascent. Experience a fresh blend of desktop idle gameplay + roguelike + RPG right now!

    IndieSimulationRPGSingle-playerSimilar games →
  8. 8
    Incremental Infinity — Steam game cover

    Incremental Infinity

    Single-player alternative to Swarm Survivor: Endless Siege — playable solo, no multiplayer required. Shares Strategy and Casual with Swarm Survivor: Endless Siege.

    An Incremental game where you explore an infinite, procedurally generated skill tree. Defend yourself against ever-growing waves of numbers. Unlock new abilities, complete quests and expand the skill tree to become infinitely powerful.

    2026StrategyCasual3.99 USDSingle-playerSimilar games →
  9. 9
    Nightgate Defense — Steam game cover

    Nightgate Defense

    Single-player alternative to Swarm Survivor: Endless Siege — playable solo, no multiplayer required. Shares Indie and RPG with Swarm Survivor: Endless Siege.

    Light incremental gameplay meets castle defense. When night falls, monsters pour from summoning gates—the city wall is your last stand. Hundreds of archers volley as one, four heroes fight at your side, and each night grows harder than the last.

    IndieAdventureRPGSingle-playerSimilar games →