Single-player games like Moon Rocks and Slimes
Below are 9 single-player Steam games similar to Moon Rocks and Slimes, 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 Moon Rocks and Slimes page.
Ranked picks
- 1
MORS
Single-player alternative to Moon Rocks and Slimes — playable solo, no multiplayer required. Shares Indie and Adventure with Moon Rocks and Slimes.
Build an automated factory on a true-scale Mars streamed from real NASA terrain. Mine, smelt and belt resources, run trains between outposts, master chemistry, and grow from a lone lander into a planet-spanning industry while the real Martian weather does its worst.
- 2
Cobalt Miner
Single-player alternative to Moon Rocks and Slimes — playable solo, no multiplayer required. Shares Indie and Adventure with Moon Rocks and Slimes.
Survive in futuristic 2046 USA where a ruthless megacorporation owns your debt. Mine cobalt, automate production, craft machines, explore a dying world, and ride your electric bike across vast pixel-art wastelands. Pay what you owe… or disappear.
- 3
AETHUS
Single-player alternative to Moon Rocks and Slimes — playable solo, no multiplayer required. Shares Indie and Adventure with Moon Rocks and Slimes.
Explore a vast underground world to mine and craft hundreds of items while building up your modular Outpost on the surface, to prospect for gems, refine resources and farm hydroponic crops in this top-down sci-fi survival-crafter where the story always provides a reason to dig deeper.
- 4
Star Valor
Single-player alternative to Moon Rocks and Slimes — playable solo, no multiplayer required. Shares Indie with Moon Rocks and Slimes.
Choose your own destiny as you explore an open-world procedurally generated galaxy where anything is possible. Become a miner, a trader, a bounty hunter, a pirate, or perhaps a jack of all trades. Start off small and build your way to the top but remember with every action, comes consequences.
- 5
SpaceCraft
Single-player alternative to Moon Rocks and Slimes — playable solo, no multiplayer required. Shares Indie and Adventure with Moon Rocks and Slimes.
The Universe is yours. SpaceCraft is an online space exploration and building game. Explore a vast galaxy of solar systems and planets, mine and craft resources, design and build ships, automate planetary bases and interplanetary logistics, trade and cooperate.
- 6
Core Keeper
Single-player alternative to Moon Rocks and Slimes — playable solo, no multiplayer required. Shares Indie and Adventure with Moon Rocks and Slimes.
Explore a vast cavern of creatures, relics and resources in a mining sandbox adventure for 1-8 players. Mine, build, fight, craft and farm to unravel the mystery of the ancient Core.
- 7
Starbound
Single-player alternative to Moon Rocks and Slimes — playable solo, no multiplayer required. Shares Indie and Adventure with Moon Rocks and Slimes.
You’ve fled your home, only to find yourself lost in space with a damaged ship. Your only option is to beam down to the planet below, repair your ship and set off to explore the universe...
- 8
Breathedge
Single-player alternative to Moon Rocks and Slimes — playable solo, no multiplayer required. Shares Indie and Adventure with Moon Rocks and Slimes.
Survive in outer space! Together with your immortal chicken, discover the truth behind your sudden spaceship crash. Craft tools, pilot vehicles, and even control space stations to survive and explore the wreckage.
- 9
Sand: A Superfluous Game
Single-player alternative to Moon Rocks and Slimes — playable solo, no multiplayer required. Shares Indie with Moon Rocks and Slimes.
An open-world, base-building, adventure game with quirky humor and llamas. Explore the wasteland of Alaska smashing skeletons in your supped-up cab and trading veggies with the native rhino people. Do the bidding of a mysterious cube from space and unlock the secrets of the desert.