City Interactive has announced more than 2m copies of Sniper: Ghost Warrior have been sold worldwide to date.
The FPS was a surprise hit when it landed in the UK last year, quickly gunning for a position in the UK All Formats Top Ten.
"We are all very happy that we have reached the two million units milestone," said City Interactive CEO Marek Tyminski. "This builds a strong belief we can do even better with the sequel and other upcoming releases."
Sniper: Ghost Warrior 2 is due for release in 2012.