Single-player games like Outpost 3
Below are 11 single-player Steam games similar to Outpost 3, 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 Outpost 3 page.
Ranked picks
- 1
Mechabot Defender
Single-player alternative to Outpost 3 — playable solo, no multiplayer required. Shares Casual with Outpost 3.
Deploy your turrets and defend against an ever-growing mechanical horde! Upgrade your turrets separately in unique ways, use unique character abilities, and create powerful synergies.
- 2
Wall World
Single-player alternative to Outpost 3 — playable solo, no multiplayer required.
Explore the mysterious Wall World on your giant robospider: mine for valuable resources, upgrade your equipment to fight off hordes of monsters, and discover exotic biomes in-between attacks. Will you be able to survive and learn the secrets of the Wall World?
- 3
Stellar Initiative
Single-player alternative to Outpost 3 — playable solo, no multiplayer required.
Stellar Initiative is a roguelike tower defense game where you land on the planet and use your orbit ship to deliver buildings and support you with fire. Complete missions, install new upgrades, discover powerful artifacts, and find the best strategy!
- 4
CRYPTARK
Single-player alternative to Outpost 3 — playable solo, no multiplayer required.
Cryptark is a 2D sci-fi shooter where you take on the role of a heavily armed privateer seeking to earn government contracts by boarding deadly alien space-hulks. It's up to you to strategize a plan of attack, pick an equipment loadout, and destroy the central core to be victorious.
- 5
Arms Evolution: ZOMBIE DESTROYER
Single-player alternative to Outpost 3 — playable solo, no multiplayer required. Shares Casual with Outpost 3.
"Arms Evolution: ZOMBIE DESTROYER" is a unique Roguelite tower defense game. You will slaughter thousands of zombies in the game and enhance your weapon towers through build character in the RPG way. and , the game also offers an idle mode, so you can enjoy building weapons anytime and anywhere.
- 6
Wall World 2
Single-player alternative to Outpost 3 — playable solo, no multiplayer required.
The adventure in the mysterious world of the Wall continues! Pilot your robospider into its depths, uncover lost artifacts and technologies, upgrade your exosuit and spider, and battle the horrors lurking in the dark. Unravel the mysteries buried in the depths of the Wall!
- 7
Battle Grid
Single-player alternative to Outpost 3 — playable solo, no multiplayer required.
Face relentless alien hordes, collect their resources and assemble an unstoppable squadron of mechs! In this Action Roguelite, discover game-breaking synergies, mix and match weapons and units, unlock upgrades, harvest and conquer alien planets.
- 8
Void Scrappers
Single-player alternative to Outpost 3 — playable solo, no multiplayer required.
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.
- 9
Outpost
Single-player alternative to Outpost 3 — playable solo, no multiplayer required. Shares Casual with Outpost 3.
this is a tower defence game,we need upgrade our weapons to fight waves of enemies,robots can mining diamonds,and we need spent those in many aspect，features of this game: 1 return back before dager comes,2tempory upgrade are important but permanent upgrade are better
- 10
BattlefieldPriest
Single-player alternative to Outpost 3 — playable solo, no multiplayer required.
this is a RTS strategy game,if you like Warcraft or Command & Conquer you maybe like this game players controller a priest to healing soldiers and choose which kind of soldiers the kingdom need , killing monters and murch for their nests
- 11
Occupy
Single-player alternative to Outpost 3 — playable solo, no multiplayer required.
Accumulate soldiers and capture cities. Choose the optimal attack routes and timing. Formulate strategies to adapt to the ever-changing battlefield and assemble your forces wisely. Defeat enemies, upgrade your troops, and take on even greater challenges.