On 2nd March 2013, the Terran Stellar Navy RP Community was officially launched. Every Saturday from 20:00 UTC until 00:00 UTC, players from around the world have gathered to play Artemis Spaceship Bridge Simulator. Our aim has been to create the most immersive and cooperative experience possible, and training the most elite crews. Originally, the Fleet used Artemis SBS, but since June 2025 the Fleet migrated to using the all new Artemis: Cosmos.

As part of our regular RP session, each player takes on the role of an officer aboard a ship in our fleet. Each crew is lead by an experience Senior Officer, and tailor made missions are hosted by our team of experienced Game Masters. Each mission links to the next to create a continuously unfolding story. 

We have an establish rank system that we use for all players, with those who play able to reach the rank of Lieutenant Senior within the fleet. Those players that remain with the fleet and exemplify the visions and aims of the TSN may also be invited to join the Senior Officer team, becoming a leader within the community and having the opportunity to command their own ship and crew. 

Players who wish to contribute further to the community can take on different roles within the fleet’s departments – be it the Training department, helping to develop training materials and supporting new players, or the Intelligence Department, and becoming one of the Game Master team.

Crafted by officers of the TSN specifically for the TSN RP Community, the TSN Mod for Artemis Cosmos adds new elements used in the TSN Sandbox for Artemis Cosmos. Within the mod, there are whole new alien races, such as the Hjorden Democratic Monarchy, additional sounds and art files, and modifications to iconography used throughout the TSN Sandbox. The mod is designed to work alongside the TSN Sandbox, a custom built mission script, and opens up a whole new range of possibilities for exploring the Artemis Universe and the rich lore of the TSN RP Community. The Mod is regularly updated to ensure it works with the latest version of Artemis: Cosmos, and continues to be developed and improved by an active Mod team.

The mod is freely available to all Artemis: Cosmos players, and can be downloaded from the TSN RP Community GitHub. 
TSN-Cosmos-Mod: Custom Cosmos Mod for the TSN RP Community

Step into the role of a starship officer in Artemis: Cosmos, a cooperative multiplayer spaceship bridge simulator where teamwork isn’t just encouraged—it’s essential. Inspired by classic sci-fi like Star Trek, Artemis places up to six players in specialized roles aboard a Terran Stellar Navy vessel: Helm, Engineering, Science, Communications, Tactical, and the all-important Captain.

Together, you’ll navigate deep space missions, coordinate defenses, manage power systems, and engage alien fleets in real-time as part of the ongoing battle for galactic stability. The universe is rich with conflict: face down aggressive Kralien warships, cunning Skaraan raiders, brutal Torgoth behemoths, and enigmatic space monsters in a dynamic and unpredictable galaxy. Strategy, communication, and coordination are your most powerful weapons.

Originally created by indie developer Thom Robertson, Artemis has earned a loyal following for its immersive team-based gameplay and LAN party-ready action. Whether you’re a sci-fi enthusiast, roleplayer, or strategy gamer, this is your chance to boldly go—together.

Join our community as we support and play Artemis: Cosmos. Ready to take your station?

Available on Steam or directly from the official website