IMHO.

Single-player games like Star Merc

Below are 8 single-player Steam games similar to Star Merc, 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 Star Merc page.

Ranked picks

  1. 1
    XenoTown — Steam game cover

    XenoTown

    Single-player alternative to Star Merc — playable solo, no multiplayer required. Shares Action and Indie with Star Merc.

    A small RPG where you play as an alien in disguise, on a mission to brainwash the humans of Earth, one person at a time. Join up with an Earth child and a germaphobic toilet on your quest to control the planet!

    2022ActionIndieAdventure1.99 USDDeck PlayableSingle-playerSimilar games →
  2. 2
    谁说奶妈不能拯救世界! — Steam game cover

    谁说奶妈不能拯救世界!

    Single-player alternative to Star Merc — playable solo, no multiplayer required. Shares Indie and Adventure with Star Merc.

    一款以探索为核心的RPG游戏! 什么?你居然是一位被人们看不起的弱小牧师? 通过你的智慧,收集情报,提升自我,然后去击败魔王来证明自己吧!

    2020StrategyIndieAdventure0.99 USDSingle-playerSimilar games →
  3. 3
    Space Mercenary Defense Force — Steam game cover

    Space Mercenary Defense Force

    Single-player alternative to Star Merc — playable solo, no multiplayer required. Shares Action and Indie with Star Merc.

    Defend against the alien invasion and take down the mother ship! Utilise branching upgrade trees, unlock new ships, and equip permanent upgrades to create your own unique build and defeat the growing hordes of invaders in this sci-fi action roguelike!

    2023ActionIndieRPG4.99 USDSingle-playerSimilar games →
  4. 4
    Fantasy Heroes 2 — Steam game cover

    Fantasy Heroes 2

    Single-player alternative to Star Merc — playable solo, no multiplayer required. Shares Adventure and RPG with Star Merc.

    Follow the adventures of mentalist Valentin and princess knight Anais, caught up in a race against time to stop a deadly virus. Who's behind the disease? Can your heroes find a cure and save the world? Play Fantasy Heroes 2 and find out!

    2020AdventureRPGCasual9.99 USDSingle-playerSimilar games →
  5. 5
    Space Pew Pew — Steam game cover

    Space Pew Pew

    Single-player alternative to Star Merc — playable solo, no multiplayer required. Shares Action and Indie with Star Merc.

    Aboard your ship, destroy the hordes of aliens attacking you by choosing your weapons and upgrades as you play, and defeat the final boss! In this roguelite, each ship has a different weapon layout, giving each one its own unique playstyle. Then create your ship and develop your own strategy!

    2026ActionIndieRPGSingle-playerSimilar games →
  6. 6
    Abda Redeemer: Space alien invasion — Steam game cover

    Abda Redeemer: Space alien invasion

    Single-player alternative to Star Merc — playable solo, no multiplayer required. Shares Action and Indie with Star Merc.

    Our brave hero Abda lost his father. After his death, he remained the only one of his kind. Everyone he loved died. After the funeral, he inherited his father's old starship. After fixing the flying saucer he had inherited, Abda got ready to go. Thus began the story of Abda Redeemer.

    2021ActionIndieAdventure2.99 USDSingle-playerSimilar games →
  7. 7
    世界尽头的蔷薇花园 — Steam game cover

    世界尽头的蔷薇花园

    Single-player alternative to Star Merc — playable solo, no multiplayer required. Shares Indie and Adventure with Star Merc.

    为了亲眼去看看那名孤独的女性和传说中的蔷薇花园,莉亚开启了她的旅程。

    2019IndieAdventureRPG0.99 USDSingle-playerSimilar games →
  8. 8
    HalloweenStory — Steam game cover

    HalloweenStory

    Single-player alternative to Star Merc — playable solo, no multiplayer required. Shares Action and Adventure with Star Merc.

    In the game, an alien named Alian will plunge into a world of Halloween full of dangers.

    2019ActionAdventureCasual12.99 USDSingle-playerSimilar games →