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
    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 →
  7. 7
    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 →
  8. 8
    Nautical Survival — Steam game cover

    Nautical Survival

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

    Captain an armed sea vessel to fight off hordes of oceanic terrors! Navigate between outposts to upgrade your boat, equip powerful weapons, manage your economy and hire crew members to your aid in this unique take on the survivors-like formula.

    2026ActionSportsIndie7.99 USDDeck PlayableSingle-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 →