IMHO.

Single-player games like Gunbot Diplomacy: Blast Off

Below are 9 single-player Steam games similar to Gunbot Diplomacy: Blast Off, 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 Gunbot Diplomacy: Blast Off page.

Ranked picks

  1. 1
    Gunbot Diplomacy — Steam game cover

    Gunbot Diplomacy

    Single-player alternative to Gunbot Diplomacy: Blast Off — playable solo, no multiplayer required. Shares Action and Indie with Gunbot Diplomacy: Blast Off.

    Splatter slimes, massacre mutants, and assemble your perfect Gunbot! Survive hordes of enemies in this top-down shooter roguelite by customizing your weapons on the unique upgrade grid, and pick from a wide variety of build-defining modules and wacky base bots for a new experience every run.

    2025ActionIndieCasual2.74 USDDeck VerifiedSingle-playerSimilar games →
  2. 2
    Wrongbots — Steam game cover

    Wrongbots

    Single-player alternative to Gunbot Diplomacy: Blast Off — playable solo, no multiplayer required. Shares Action and Casual with Gunbot Diplomacy: Blast Off.

    Annihilate robot hordes and survive in this roguelite shooter. Hack or smash productive machinery. Grab resources and craft cool items. Swap body parts with glamour or extravaganza. Modify your weapons to absurdity. See how clever AI has become?

    2027ActionCasualSingle-playerSimilar games →
  3. 3
    Soul Machine — Steam game cover

    Soul Machine

    Single-player alternative to Gunbot Diplomacy: Blast Off — playable solo, no multiplayer required. Shares Action and Indie with Gunbot Diplomacy: Blast Off.

    Build your ultimate mech and face endless hordes of rogue robots. In this fast-paced rogue-lite twin-stick shooter, combine devastating weapons, unlock synergies, and salvage scrap to survive the mechanical swarm. Will your chassis hold together?

    2026ActionStrategyIndie3.49 USDSingle-playerSimilar games →
  4. 4
    Lost Galaxy: Survivors — Steam game cover

    Lost Galaxy: Survivors

    Single-player alternative to Gunbot Diplomacy: Blast Off — playable solo, no multiplayer required. Shares Action and Casual with Gunbot Diplomacy: Blast Off.

    Defend massive interdimensional portals against relentless alien swarms in this fast-paced sci-fi top-down survival shooter.

    ActionStrategyCasualSingle-playerSimilar games →
  5. 5
    A.V.E.N.A. — Steam game cover

    A.V.E.N.A.

    Single-player alternative to Gunbot Diplomacy: Blast Off — playable solo, no multiplayer required. Shares Action and Indie with Gunbot Diplomacy: Blast Off.

    Pilot disposable combat drones through the Primal Portal in a sci-fi action roguelike. Customize your drone, fight through various missions, recover research data and alien technology to enhance your drone setup for the next session.

    2026ActionIndieEarly AccessSingle-playerSimilar games →
  6. 6
    Blast Beam Bang — Steam game cover

    Blast Beam Bang

    Single-player alternative to Gunbot Diplomacy: Blast Off — playable solo, no multiplayer required. Shares Action and Indie with Gunbot Diplomacy: Blast Off.

    Blast Beam Bang is a top-down roguelite arena shooter where you upgrade and modify active abilities and weapons between waves to create evolving builds and survive relentless robot swarms.

    2026ActionIndieCasualSingle-playerSimilar games →
  7. 7
    Deep Breach — Steam game cover

    Deep Breach

    Single-player alternative to Gunbot Diplomacy: Blast Off — playable solo, no multiplayer required. Shares Action and Indie with Gunbot Diplomacy: Blast Off.

    Deploy orbital defenses, fuse experimental turret technologies, and engineer devastating weapon builds in a tactical sci-fi horde survival roguelike. Break shields, shred armor, and adapt to evolving bio-corrupted swarms alongside a damaged tactical AI.

    2026ActionIndieRPGSingle-playerSimilar games →
  8. 8
    Genome Guardian 2 — Steam game cover

    Genome Guardian 2

    Single-player alternative to Gunbot Diplomacy: Blast Off — playable solo, no multiplayer required. Shares Action and Indie with Gunbot Diplomacy: Blast Off.

    COMBINE WEAPONS in the microscopic shooter with macroscopic depth. BUILD YOUR NANOBOT from hundreds of parts. SURVIVE the microbial onslaught once more in this psychedelic dive to the Abyss, full of mutations, minerals, anomalies and powerup polyps. SHMUP mode turns it into a vertical shoot 'em up!

    2026ActionIndieRPG15.99 USDDeck PlayableSingle-playerSimilar games →
  9. 9
    Stirring Abyss — Steam game cover

    Stirring Abyss

    Single-player alternative to Gunbot Diplomacy: Blast Off — playable solo, no multiplayer required. Shares Indie with Gunbot Diplomacy: Blast Off.

    Stirring Abyss is an indie tactical squad-based game with strong RPG elements in which you uncover the ancient mysteries of the depths depicted in the classic vein of Lovecraftian horror.

    2020StrategyIndieAdventure24.99 USDSingle-playerSimilar games →