Single-player games like Trespassers
Below are 8 single-player Steam games similar to Trespassers, 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 Trespassers page.
Ranked picks
- 1

Exploding Babies
Single-player alternative to Trespassers — playable solo, no multiplayer required. Shares Action and Indie with Trespassers.
Exploding Babies is an absurd and chaotic shared screen arena blaster/party game for up to four simultaneous players. Enter a post-apocalyptic world where human babies are pitted against each other as part of a slowly unraveling intergalactic conspiracy to breed alien superchildren.
- 2

New Outbreak
Single-player alternative to Trespassers — playable solo, no multiplayer required. Shares Action and Indie with Trespassers.
New Outbreak is a 2D top-down zombie survival game. It allows you to survive how you want, build the things you want and take care of your companion.
- 3

Yet Another Zombie Defense HD
Single-player alternative to Trespassers — playable solo, no multiplayer required. Shares Action and Indie with Trespassers.
Top-down zombie shooter with tower defense elements featuring up to 4 players local and online co-op. Build your base by day, defend it by night, put your skills to the test to stay alive as long as possible! Darkness is coming. How long can YOU survive?
- 4

Project Alpha 002
Single-player alternative to Trespassers — playable solo, no multiplayer required. Shares Action and Indie with Trespassers.
Abandoned wilderness awaits you, every day is a struggle to survive. Fight against hunger, the nature and the remaining residents. Collect resources to build a fortress, gain experience to earn supply drops to improve your survival chances in survivalmode.
- 5

Ben and Ed - Blood Party
Single-player alternative to Trespassers — playable solo, no multiplayer required. Shares Action and Indie with Trespassers.
Welcome to the Blood Party! Play together with up to 3 people and compete in deadly game shows. Customize your zombie, build your own levels, share them via Steam Workshop and die a lot.
- 6

Not Dying Today
Single-player alternative to Trespassers — playable solo, no multiplayer required. Shares Action and Indie with Trespassers.
Not dying today is a 2D side-scrolling action game. In 2030, the world has been taken over by zombies. With fire and blade, bullets and guns, you, captain Aiden, will do anything to protect the last human kind, anything, even turn into a zombie, using zombie power to kill zombies.
- 7

VERSUS SQUAD
Single-player alternative to Trespassers — playable solo, no multiplayer required. Shares Action and Indie with Trespassers.
Versus Squad is a fast action twin-stick shooter from the creator of Nation Red. Build your own sandbox defense and battle thousands of zombie mutants in top down combat! Face up to a dozen bosses. Simultaneously. Collect loot, build and repair. Play single player, on-line or local coop!
- 8

Gears 5
Single-player alternative to Trespassers — playable solo, no multiplayer required. Shares Action with Trespassers.
From one of gaming’s most acclaimed sagas, Gears is bigger than ever. With all-out war descending, Kait Diaz breaks away to uncover her connection to the enemy and discovers the true danger to Sera – herself.