Those sales are separate from the millions of times that PlayStation 4 owners downloaded Rocket League free last summer, when it was a PlayStation Plus title during the month of July. In addition, Rocket League players have bought more than 5 million pieces of downloadable content for the game across PlayStation 4, Windows PC and Xbox One.
Psyonix's total revenue for Rocket League now exceeds $110 million — more than twice as much as the studio made in the game's first six months or so on the market. That's not too shabby, considering that Psyonix spent less than $2 million over a two-year period to make Rocket League.
Forbes also reports that Psyonix counts 15 million lifetime players for Rocket League, nearly twice as many as there were in mid-December. The community is still going strong: In April, two months after Rocket League launched on Xbox One, the game had more than 5 million active players.
"Our numbers are actually going up, not down," Psyonix vice president Jeremy Dunham told Forbes, "which is not very common for a game that's ten months old."
Psyonix plans to continue supporting Rocket League with add-ons, keeping any gameplay DLC free and charging players only for new vehicles and cosmetic items. The studio added a basketball mode in April, following a hockey mode last fall.
The company brought cross-platform play to the Xbox One version last week, making it possible for people on that console to play with friends on PC. (PS4/PC multiplayer has been available since launch.) Psyonix is hoping to eventually support PS4/Xbox One multiplayer, although that's up to Sony and Microsoft working together.
For more on Rocket League, read our review.