Single-player games like Radia Island
Below are 9 single-player Steam games similar to Radia Island, 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 Radia Island page.
Ranked picks
- 1
Galaxy Scavengers
Single-player alternative to Radia Island — playable solo, no multiplayer required. Shares Strategy and Indie with Radia Island.
Mine, build, upgrade, and extract. Scavenge planets in a base-building resource management sim. Gather materials, construct facilities, and order units to survive in a hostile galaxy. Launch your base to the next zone before planetary threats overwhelm you.
- 2
Beyond These Stars
Single-player alternative to Radia Island — playable solo, no multiplayer required. Shares Strategy and Simulation with Radia Island.
Build a city on the back of a Space Whale and learn to coexist as you journey through the stars. Manage intricate supply chains and the needs of your people as you build outposts, meet aliens, and uncover the mysteries of the universe.
- 3
Corsair Cove
Single-player alternative to Radia Island — playable solo, no multiplayer required. Shares Strategy and Simulation with Radia Island.
Build a sprawling pirate haven, raise a fleet to explore the high seas, and take on the Crown to keep the Age of Piracy alive! From ale to flintlock pistols, and from scallywags to swashbucklers, you’ll need to manage complex production chains and govern a rowdy crew to reign supreme over the seas!
- 4
Steel Artery: Train City Builder
Single-player alternative to Radia Island — playable solo, no multiplayer required. Shares Strategy and Indie with Radia Island.
Build a living city on rails in this steampunk fantasy train-city builder. Manage multiracial colonies with thousands of autonomous citizens, balance their needs, manage the economy, and create logistics as you explore distant regions to ensure the prosperity of your Empire.
- 5
Mandate Order
Single-player alternative to Radia Island — playable solo, no multiplayer required. Shares Strategy and Indie with Radia Island.
Mandate Order is a Warring States war city-builder set in ancient China. Build a stronghold, manage industries and logistics, recruit scholars from the Hundred Schools of Thought, raise armies, and command real-time tactical battles with thousands of soldiers.
- 6
Captain of Industry
Single-player alternative to Radia Island — playable solo, no multiplayer required. Shares Strategy and Indie with Radia Island.
Build an industrial empire on a remote island. Mine resources, reshape terrain with excavators, grow food, construct factories, lay train tracks, and trade with the outside world. Research 100+ technologies to advance from basic metal smelting all the way to nuclear power and space flight.
- 7
The Wandering Village
Single-player alternative to Radia Island — playable solo, no multiplayer required. Shares Strategy and Simulation with Radia Island.
The Wandering Village is a city-building simulation game on the back of a giant, wandering creature. Build your settlement and form a symbiotic relationship with the colossus. Will you survive together in this hostile, yet beautiful post-apocalyptic world, contaminated by poisonous plants?
- 8
Whiskerwood
Single-player alternative to Radia Island — playable solo, no multiplayer required. Shares Strategy and Simulation with Radia Island.
Establish a home for your industrious mice under the oppressive paw of your cat overlords in this city builder featuring complex simulations, intricate production chains, and the age-old rivalry between cat and mouse.
- 9
Winter Nest
Single-player alternative to Radia Island — playable solo, no multiplayer required. Shares Strategy and Indie with Radia Island.
You play as a beetle exploring the underground world, working together with ants. Expand the nest, gather resources, and maintain the nest’s temperature to survive the long winter.