Dass147,470 15 Jun 2025 21 Oct 2016 15 Jun 2025
Edit 2025: Just change your system date if you're not playing in Christmas time. The achievement is obtainable again.
This achievement is, as of 2016, unobtainable. The original way of achieving it was by grabbing gifts dropped by opponents (bots or other players) after you killed them. The achievement was tied to the Winter Event of Christmas 2011.
Since then there have been many discussions in possible strategies of how to get it, with one consisting of changing the PC date to Christmas 2011, but it has since been proved that this won't work. Just check the old Steam forums or the Steam Community CS:S discussions and you can see the frustration around this single broken achievement.