Today, Icelandic developer CCP Games announced that subscriptions for its Eve Online MMO have surpassed the 500,000 mark.

Eve Online is the science fiction MMO that allows players to operate and own their own spaceships while participating in a player-created universe full of political intrigue and trade negotiations. Because of the game’s heavy reliance on trade and economics, it is often disparagingly (or lovingly) referred to as “spreadsheets in space.” Though the game isn’t free-to-play, players who have enough of Eve‘s in-game currency can purchase monthly subscriptions with it.

“Ten years after release, it is incredibly inspiring that, through a lot of hard work from our Eve Online team, we are crossing the half-million subscriber mark,” said Hilmar Veigar Pétursson, CEO of CCP. “For me, this is a true testament that Eve can live on forever, as long as we do right by her. We have not come to this point alone; millions of players have helped push us to this milestone. I now know in my mind what I previously only believed in my heart: that Eve will outlive us all.”

In January, CCP began an open beta on the PlayStation 3 console for its new game, Dust 514. Dust 514 is a free-to-play first-person shooter that shares the same world as Eve Online. Actions taken in either game can affect the economy, politics, and outcome of battles in the other.