Eve Online

Vendetta Online is a 3D space combat MMORPG that lets thousands of players pilot customizable ships in a persistent galaxy. Available on Windows, Mac, Linux, Android, iOS and VR, the game blends real‑time twitch combat with sandbox RPG progression.

✦ Best for hardcore space combat fans who want cross‑platform, free‑to‑play sandbox rpg

Jumpgate: The Reconstruction Initiative thrusts players into an expansive, open‑world galaxy where they pilot customizable ships, engage in combat, and trade across dozens of star systems.

✦ Best for die-hard space mmo fans

Star Citizen is an ambitious sandbox open-world space simulation game developed by Cloud Imperium Games.

✦ Best for hardcore space sim fans seeking deep open-world exploration and combat.

Star Trek Online lets you don the iconic uniforms of the United Federation of Planets or the Klingon Empire and embark on epic space adventures. Command your own starship, lead away teams, and engage in tactical combat across a vast galaxy—all for free.

✦ Best for star trek fans craving deep ship/character customization and co‑op play

Oort Online is a sandbox MMO where players can build, explore, and collaborate across a procedurally generated galaxy. From constructing massive space stations to terraforming planets, the game offers endless creative freedom.

✦ Best for players craving collaborative, limitless sandbox creation in space

Entropy is an open‑universe science‑fiction MMO that lets you roam a hostile galaxy of over a hundred fully explorable solar systems. Hunt, trade, mine, and salvage to survive while engaging in massive space combat.

✦ Best for hardcore space mmo fans craving massive sandbox with player-driven narrative