Single-player games like Space Mercenary Defense Force
Below are 8 single-player Steam games similar to Space Mercenary Defense Force, 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 Space Mercenary Defense Force page.
Ranked picks
- 1
Space Grunts
Single-player alternative to Space Mercenary Defense Force — playable solo, no multiplayer required. Shares Action and Indie with Space Mercenary Defense Force.
A turn-based game on a planet outpost - with no waiting between turns! Play it at the speed of an arcade game, or take your time and think about your next step.. no matter how fast you take your turn, it might be your last!
- 2
Vampire Survivors
Single-player alternative to Space Mercenary Defense Force — playable solo, no multiplayer required. Shares Action and Indie with Space Mercenary Defense Force.
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!
- 3
Hive Jump 2: Survivors
Single-player alternative to Space Mercenary Defense Force — playable solo, no multiplayer required. Shares Action and Indie with Space Mercenary Defense Force.
Become an agent of vengeance in this bullet-heaven action roguelite! You are the lone survivor of your squad, on an alien planet with just your weapon, a jetpack, and the courage to keep fighting. Kill off alien swarms and transform their valuable guts into explosive upgrades and vital utilities.
- 4
Fission Superstar X
Single-player alternative to Space Mercenary Defense Force — playable solo, no multiplayer required. Shares Action and Indie with Space Mercenary Defense Force.
Blast off in Dr. Leopold's bomber in this relentless rogue-lite shooter. Tour the solar system on a desperate randomly generated bomb run. Face impossible odds trying to achieve the demented dream of an insane scientist.
- 5
Boneraiser Minions
Single-player alternative to Space Mercenary Defense Force — playable solo, no multiplayer required. Shares Action and Indie with Space Mercenary Defense Force.
Amass an army of undead to fight endless waves of heroes intent to end your boneraising ways! In this gothic auto-battler rogue-lite Survivor-like, use the bones of slain heroes to raise your minions, collect relics and spells, and unlock meta upgrades, all to survive King Gigald's crusade!
- 6
Overture
Single-player alternative to Space Mercenary Defense Force — playable solo, no multiplayer required. Shares Action and Indie with Space Mercenary Defense Force.
Overture is an action-adventure roguelike which draws heavy inspiration from hits such as Diablo, Realm of The Mad God, Zelda, and The Binding of Isaac. Explore vast randomly generated dungeons and slay hordes of cunning enemies!
- 7
Legend of Dungeon
Single-player alternative to Space Mercenary Defense Force — playable solo, no multiplayer required. Shares Action and Indie with Space Mercenary Defense Force.
Legend of Dungeon is a randomly generated action RPG Beat'em'up with heavy Rogue-like elements, striking visuals, and dynamic music.
- 8
Void Scrappers
Single-player alternative to Space Mercenary Defense Force — playable solo, no multiplayer required. Shares Action with Space Mercenary Defense Force.
Blast hordes of alien ships into junk. Collect the scrap to upgrade your ship into an unstoppable force of destruction. Unlock new characters and weapons and upgrade your stats between runs.