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
HYPERCHARGE: Unboxed
Single-player alternative to Monster Outbreak — playable solo, no multiplayer required. Shares Action and Strategy with Monster Outbreak.
Hypercharge is a first and third-person shooter action figure game you've always dreamed of! Grab your friends, complete objectives, defend the Hypercore against waves of weaponized toys, and defeat Major Evil together in the story campaign!
- 3
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.
- 4
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!
- 5
7 Days to Die
Single-player alternative to Monster Outbreak — playable solo, no multiplayer required. Shares Action and Strategy with Monster Outbreak.
7 Days to Die is an open-world game that is a unique combination of first-person shooter, survival horror, tower defense, and role-playing games. Play the definitive zombie survival sandbox RPG that came first. Navezgane awaits!
- 6
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.
- 7
Dungeon Defenders: Awakened
Single-player alternative to Monster Outbreak — playable solo, no multiplayer required. Shares Action and Strategy with Monster Outbreak.
Dungeon Defenders: Awakened is co-op Tower Defense combined with epic Action RPG combat. You’re able to join forces with up to four players to take on a never-ending army of orcs, demons, and dragons! Are your defenses strong enough to save the world of Etheria?
- 8
Aegis Defenders
Single-player alternative to Monster Outbreak — playable solo, no multiplayer required. Shares Action and Strategy with Monster Outbreak.
Take on wild beasts, ruthless soldiers, and ancient gods in this 2D Action-Platformer inspired by Tower-Defense combat.
- 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.