Single-player games like Catalyst
Below are 13 single-player Steam games similar to Catalyst, 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 Catalyst page.
Ranked picks
- 1
The Forest
Single-player alternative to Catalyst — playable solo, no multiplayer required. Shares Simulation with Catalyst.
As the lone survivor of a passenger jet crash, you find yourself in a mysterious forest battling to stay alive against a society of cannibalistic mutants. Build, explore, survive in this terrifying first person survival horror simulator.
- 2
Euro Truck Simulator 2
Single-player alternative to Catalyst — playable solo, no multiplayer required. Shares Simulation with Catalyst.
Travel across Europe as king of the road, a trucker who delivers important cargo across impressive distances! With dozens of cities to explore, your endurance, skill and speed will all be pushed to their limits.
- 3
Cities: Skylines
Single-player alternative to Catalyst — playable solo, no multiplayer required. Shares Simulation with Catalyst.
Cities: Skylines is a modern take on the classic city simulation. The game introduces new game play elements to realize the thrill and hardships of creating and maintaining a real city whilst expanding on some well-established tropes of the city building experience.
- 4
Kerbal Space Program
Single-player alternative to Catalyst — playable solo, no multiplayer required. Shares Simulation with Catalyst.
In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. You have access to an array of parts to assemble fully-functional spacecraft that flies (or doesn’t) based on realistic aerodynamic and orbital physics.
- 5
Europa Universalis IV
Single-player alternative to Catalyst — playable solo, no multiplayer required. Shares Simulation with Catalyst.
Rule your land and dominate the world with unparalleled freedom, depth and historical accuracy. Write a new history of the world and build an empire for the ages.
- 6
Assetto Corsa
Single-player alternative to Catalyst — playable solo, no multiplayer required. Shares Simulation with Catalyst.
Assetto Corsa v1.16 introduces the new "Laguna Seca" laser-scanned track, 7 new cars among which the eagerly awaited Alfa Romeo Giulia Quadrifoglio! Check the changelog for further info!
- 7
Mount & Blade II: Bannerlord
Single-player alternative to Catalyst — playable solo, no multiplayer required. Shares Simulation with Catalyst.
A strategy/action RPG. Create a character, engage in diplomacy, craft, trade and conquer new lands in a vast medieval sandbox. Raise armies to lead into battle and command and fight alongside your troops in massive real-time battles using a deep but intuitive skill-based combat system.
- 8
SPORE™
Single-player alternative to Catalyst — playable solo, no multiplayer required. Shares Simulation with Catalyst.
Be the architect of your own universe with Spore, an exciting single-player adventure. From Single Cell to Galactic God, evolve your creature in a universe of your own creations.
- 9
Breacher Story
Single-player alternative to Catalyst — playable solo, no multiplayer required.
An interactive narrative in social engineering.
- 10
Life In Helsinki
Single-player alternative to Catalyst — playable solo, no multiplayer required.
Life in Helsinki is a visual novel where the player follows the life of Lottie, a graduate moving to Helsinki for an internship in a law firm.
- 11
Doomsday Room
Single-player alternative to Catalyst — playable solo, no multiplayer required. Shares Simulation with Catalyst.
A fictional geopolitical game set during a fictional Cold War.
- 12
Tales of the Black Death
Single-player alternative to Catalyst — playable solo, no multiplayer required.
An interactive story that pins your morality against your survival.
- 13
Vintage Records from Hell
Single-player alternative to Catalyst — playable solo, no multiplayer required. Shares Simulation with Catalyst.
With the help of Baphomet, bring back Heavy Metal to its former glory by managing a Vintage Record store using the power of the occult...eh...like...Record Store Tycoon meets the Number of the Beast.