IMHO.

Single-player games like Gunbot Diplomacy

Below are 12 single-player Steam games similar to Gunbot Diplomacy, 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 page.

Ranked picks

  1. 1
    Gunbot Diplomacy: Blast Off — Steam game cover

    Gunbot Diplomacy: Blast Off

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

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

    2025ActionIndieFree To PlayFreeSingle-playerSimilar games →
  2. 2
    Deep Breach — Steam game cover

    Deep Breach

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

    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 →
  3. 3
    Tankron — Steam game cover

    Tankron

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

    Tankron is a top-down wave survival roguelike in which you fight an ever-increasing amount and variety of enemies. Choose from a variety of upgrades to stand a chance. Discover and choose between different tank specializations to enhance your Build.

    2022ActionStrategyIndie2.99 USDSingle-playerSimilar games →
  4. 4
    Guardians Of Restoration — Steam game cover

    Guardians Of Restoration

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

    Face 56 unique bosses in thrilling roguelike action! Some bosses use 3 random attack patterns, making each encounter feel fresh and challenging. Combine skill trees and specials to craft your strategy and claim victory!

    2025ActionIndieEarly Access8.99 USDSingle-playerSimilar games →
  5. 5
    Novi Blaster — Steam game cover

    Novi Blaster

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

    Bullet Hell or Heaven? A rogue-like where you upgrade yourself and your enemies. Strategize around your build choices and dominate the battlefields of Novi Blaster.

    2024ActionIndieRPG3.99 USDSingle-playerSimilar games →
  6. 6
    Soul Machine — Steam game cover

    Soul Machine

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

    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 →
  7. 7
    Kitty's Last Adventure — Steam game cover

    Kitty's Last Adventure

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

    Cute Survivor where you play as Kitty the cat aboard her flying cat-saucer🛸 created by her distraught human.

    2025ActionCasual4.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Airships: Lost Flotilla — Steam game cover

    Airships: Lost Flotilla

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

    Airships: Lost Flotilla is a steampunk autoshooter where you fight your way through waves of enemies on your way to a safe harbour. Destroy your foes, harvest wreckage, and upgrade your ship.

    2025ActionIndieCasual8.99 USDDeck VerifiedSingle-playerSimilar games →
  9. 9
    Vampire Survivors — Steam game cover

    Vampire Survivors

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

    Mow down thousands of night creatures and survive until dawn! Vampire Survivors is a gothic horror casual game with rogue-lite elements, where your choices can allow you to quickly snowball against the hundreds of monsters that get thrown at you. Be the bullet hell!

    2022ActionIndieRPG4.99 USDDeck VerifiedSingle-playerSimilar games →
  10. 10
    Slime 3K: Rise Against Despot — Steam game cover

    Slime 3K: Rise Against Despot

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

    Welcome to Slime 3K, an unhinged roguelite bullet-heaven set in the Despot’s Game universe! Build a deck of crazy weapons, grow stronger and devour hordes of pink puny humans as a murderous jelly blob on a warpath of death, violence and pretzels.

    2024ActionIndieRPG1.24 USDDeck VerifiedSingle-playerSimilar games →
  11. 11
    Brotato — Steam game cover

    Brotato

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

    Brotato is a top-down arena shooter roguelite where you play a potato wielding up to 6 weapons at a time to fight off hordes of aliens. Choose from a variety of traits and items to create unique builds and survive until help arrives.

    2023ActionIndieRPG4.99 USDDeck VerifiedSingle-playerSimilar games →
  12. 12
    Stirring Abyss — Steam game cover

    Stirring Abyss

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

    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 →