The online science fiction shooter game Destiny made more than $500 million in sales on Tuesday, the first day it was released, according to Santa Monica videogame publisher Activision Blizzard Inc., which published the game in conjunction with Bungie Inc., the studio that created the Halo game for Xbox.

“This industry milestone marks another blockbuster success for our company and demonstrates our unique ability to create some of the most successful entertainment franchises in the world,” said Activision’s Chief Executive Bobby Kotick. “The success of Destiny, along with the recent introduction of Blizzard Entertainment’s Hearthstone, is further validation of our unique capabilities to create great entertainment franchises from the ground up.”

Destiny is set 700 years in the future, inside a post-apocalyptic world overrun by aliens. Gamers play as “Guardians” who set out to save what’s left of our world.