Single-player games like Monster Outbreak
Below are 9 single-player Steam games similar to Monster Outbreak, 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 Monster Outbreak page.
Ranked picks
- 1
The Riftbreaker
Single-player alternative to Monster Outbreak — playable solo, no multiplayer required. Shares Action and Strategy with Monster Outbreak.
The Riftbreaker is a solo or Co-op base-building, survival game with Action-RPG elements for up to 4 players. Hack & slash countless hordes of enemies. Build up your base, craft powerful weapons and research new inventions to survive.
- 2
First Dwarf
Single-player alternative to Monster Outbreak — playable solo, no multiplayer required. Shares Action and Indie with Monster Outbreak.
Pilot a dwarven mech and fly a dragon as you build and defend outposts across a shattered magical realm. Craft, explore, and survive the dangers of floating islands corrupted by the Taint in this action-packed survival RPG with base-building and co-op.
- 3
ARK: Survival Ascended
Single-player alternative to Monster Outbreak — playable solo, no multiplayer required. Shares Action and Indie with Monster Outbreak.
ARK is reimagined from the ground-up into the next-generation of video game technology with Unreal Engine 5! Form a tribe, tame & breed hundreds of unique dinosaurs and primeval creatures, explore, craft, build, and fight your way to the top of the food-chain. Your new world awaits!
- 4
Lumencraft
Single-player alternative to Monster Outbreak — playable solo, no multiplayer required. Shares Action and Strategy with Monster Outbreak.
Lumencraft is a unique combination of a top-down, rogue-like shooter and base building with tower defense elements. Dig and light up dark halls of a fully destructible environment on procedurally generated maps and campaign levels to find precious Lumen - humanity's only chance for survival.
- 5
Voltaire: The Vegan Vampire
Single-player alternative to Monster Outbreak — playable solo, no multiplayer required. Shares Action and Indie with Monster Outbreak.
Rebel against your legacy in this farming action roguelite. Tend your spooky farm by day & defend your crops from enemies at night! Upgrade Voltaire, youngest son of Dracula, with devious new abilities & discover dozens of new plants to cultivate. Send dad a message: a vegan life is no missed steak!
- 6
Keep Keepers
Single-player alternative to Monster Outbreak — playable solo, no multiplayer required. Shares Action and Strategy with Monster Outbreak.
Tower Defense meets Base Management. Strategically place your defenses. Craft wacky ammunition like fiery peppers and boomerang bananas. Discover amazing weapons and automate your economy while defending against waves of enemies. Can you handle the chaos?
- 7
Welcome to ParadiZe
Single-player alternative to Monster Outbreak — playable solo, no multiplayer required. Shares Action and Adventure with Monster Outbreak.
Paradise isn't exactly what you hoped for: it's infested with zombies! Thankfully, you can control them. Capture them and teach them to farm or fight. They will help you defend our camp while you explore the world looking for… a new paradise.
- 8
Dig or Die
Single-player alternative to Monster Outbreak — playable solo, no multiplayer required. Shares Action and Strategy with Monster Outbreak.
Crash land on a hostile planet where you'll have to build the strongest defenses if you wish to live to escape from it. But be warned... this planet is merciless. Build strong, and smart; else physics may flood or destroy your only hopes of survival.
- 9
Slime Rancher
Single-player alternative to Monster Outbreak — playable solo, no multiplayer required. Shares Action and Indie with Monster Outbreak.
Slime Rancher is the tale of Beatrix LeBeau, a plucky, young rancher who sets out for a life a thousand light years away from Earth on the ‘Far, Far Range’ where she tries her hand at making a living wrangling slimes.