Sci-Fi & Space Sandbox MMORPGs

A persistent science-fiction sandbox MMO built around player corporations, territorial conflict, industry, logistics, politics, piracy, and a deeply player-driven economy.

Frontier's long-running space sandbox MMO: explore a 1:1 Milky Way, trade, mine, fight, influence factions and Powerplay, operate Fleet Carriers and participate in a persistent background simulation.

A long-running sci-fi MMO built around a real-cash virtual economy, hunting, mining, crafting, trading, land ownership, professions and open-ended skill progression.

A long-running cyberpunk MMORPG blending FPS-style combat with RPG progression, factions, clans, trading, crafting and open-world PvP in a persistent post-apocalyptic setting.

A free browser-based open-ended space MMORPG where players trade, pirate, smuggle, fight, upgrade ships and pursue military or economic careers in a persistent universe.

A small indie sci-fi survival sandbox MMORPG about colonizing a hostile alien world. Its playable builds include terraforming, survival systems and downloadable official server software, with Windows as the current platform.

An MMO strategy sandbox where players program colonies with real JavaScript. Scripts run continuously in a huge persistent online world, automating harvesting, construction, logistics, trading, expansion and warfare even while the player is offline.

The current Sigma World project and successor to Sigma World Online. The official Russian site provides a downloadable Foundation build and links to the legacy project; the premium-account system is still marked as under development.

A persistent space sandbox with cargo, mining, salvage, piracy, bounty hunting, multicrew ships and reputation.

A persistent space MMO combining arcade ship combat with RPG progression, player-built stations, colonies, resource extraction, robotic trade routes and empire creation.

Frozenbyte's highly technical space sandbox MMO built around voxel/vertex construction. Players mine resources, design and manufacture ships, build stations, trade, form companies and fight in a persistent, destructible universe. The game remains online in Early Access, although active development has been limited for long stretches.

A persistent skill-based space MMORPG with real-time combat, trading, mining, guilds, faction warfare and player-built capital ships, playable across desktop and mobile platforms.