Just a month after launch, the free to play shooter Tribes: Ascend has clocked 1.2 million downloads just over a month after its April 12 release.
The online shooter is the latest in the series that made its debut in 1998, and is developed by independent studio Hi-Rez, a Georgia-based team of 53.
With a unique take on free to play that offers customers the ability to earn unlocks with experience, or get them immediately with a purchase, the game is challenging assumptions about the genre.
"Our philosophy is to focus first on making a fun an engaging game," Hi-Rez COO Todd Harris told Gamasutra.
"Second, by making it free you create a large audience to play the game. And third, you implement the store so that it doesn't give any gameplay advantage to a paying player, but it gives a time advantage or a prestige advantage - the latter in the form of cosmetic skins."
Almost a tenth of all users were drawn to the game via the friend referral system, which rewards players for inviting their pals to join them in-game.