IMHO.

Single-player games like Prime Monster System

Below are 8 single-player Steam games similar to Prime Monster System, 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 Prime Monster System page.

Ranked picks

  1. 1
    Moonlight Chess — Steam game cover

    Moonlight Chess

    Single-player alternative to Prime Monster System — playable solo, no multiplayer required. Shares Strategy and Indie with Prime Monster System.

    Moonlight Chess is a turn-based tactical auto-battler where you must assemble your own army, defeat waves of enemies, and vanquish the evil ravaging the kingdom!

    2025StrategyIndieAdventure7.99 USDSingle-playerSimilar games →
  2. 2
    Divine Tactics — Steam game cover

    Divine Tactics

    Single-player alternative to Prime Monster System — playable solo, no multiplayer required. Shares Strategy with Prime Monster System.

    Lead your team of divine allies to victory in this roguelike autobattler. Position your units, unleash their unique powers, and outsmart rivals in this asynchronous multiplayer competition.

    StrategySingle-playerSimilar games →
  3. 3
    Hundred Battle — Steam game cover

    Hundred Battle

    Single-player alternative to Prime Monster System — playable solo, no multiplayer required. Shares Strategy and Indie with Prime Monster System.

    Grow like a roguelike, draft your party like an auto-battler, command like an RTS — a semi-auto-battler roguelike of a hundred battles.

    2026StrategyIndieSingle-playerSimilar games →
  4. 4
    Flowers and Deities — Steam game cover

    Flowers and Deities

    Single-player alternative to Prime Monster System — playable solo, no multiplayer required. Shares Strategy and Indie with Prime Monster System.

    Flowers and Deities is a strategy deckbuilder roguelite where you command a blood-soaked lizardkin army through escalating arena battles, spending every drop of spilled blood to cast spells, summon creatures, and survive long enough to claim the favor of the Gods

    2026StrategyIndieSimulation12.99 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    Astroguelike — Steam game cover

    Astroguelike

    Single-player alternative to Prime Monster System — playable solo, no multiplayer required. Shares Strategy and Indie with Prime Monster System.

    Destroy humanity in this roles-reversed Asteroids game! This is a sci-fi strategy roguelite auto battler based on games like Super Auto Pets and Crops, where you launch asteroids at an human spaceship. Develop different synergies and builds with dozens of types of asteroids with unique abilities.

    StrategyIndieFree To PlayFreeSingle-playerSimilar games →
  6. 6
    Legion Draft — Steam game cover

    Legion Draft

    Single-player alternative to Prime Monster System — playable solo, no multiplayer required. Shares Strategy with Prime Monster System.

    This is an async PvP card autobattler where each card represents a troop group that keeps growing. Draft cards, recruit soldiers, and build a legion that surpasses every opponent. Explore fantasy races with different synergies, and become a master strategist!

    StrategyCasualSingle-playerSimilar games →
  7. 7
    AutoChess of Gensokyo — Steam game cover

    AutoChess of Gensokyo

    Single-player alternative to Prime Monster System — playable solo, no multiplayer required. Shares Strategy with Prime Monster System.

    "AutoChess of Gensokyo" is a Touhou Project multi-player AutoChess-Like game. Draw character from the deck, build your combination, upgrade the character, and fight with other players. Keep optimizing your combination to win the game.

    2021StrategyCasualEarly Access15.99 USDDeck PlayableSingle-playerSimilar games →
  8. 8
    Warring Triad — Steam game cover

    Warring Triad

    Single-player alternative to Prime Monster System — playable solo, no multiplayer required. Shares Strategy and Indie with Prime Monster System.

    Dive into Warring Triad, where the thrilling mechanics of your favorite old-school card games meet an immersive roguelike adventure. After a mysterious spaceship crash-lands on a vibrant new planet, a group of children transforms into a community united by the art of card battles.

    2026StrategyIndieMassively MultiplayerSingle-playerSimilar games →