Microsoft's Aaron Greenberg has revealed that over 2.5 billion Xbox 360 Achievements have been unlocked so far.
That, he explained to Gamasutra, totals a massive 52 billion gamerpoints, and averages out at around 150 Achievements per player.
The hunger for Achievements, added Greenberg, has helped the Xbox 360 reach an attach rate of eight games per console. Greenberg reckons that's the "highest ever" for any platform.
"We never anticipated this reaction," added Greenberg, "where there are Achievement fan-sites and people playing games that they would never play [for the Achievement points]."