I bought a mystery game but I can't find it in my account. I organized my titles by purchase date and it isn't there.

You probably got the bug:
http://www.gog.com/forum/general/the_big_winter_sale_starts_now_a558d/post50

So you'll need to wait until they solve this.

Damned, have than the same bug too :-/
I bought Door Kickers and 1 mystery game together but only Door Kickers appears in my Itemlist and it added only 1 new item.... but in my history and in my mail in the post account all looks normal and its all listed right but nothing about the mystery game in the game inventar ,there, its like nothing happened and it clearly shows only 1 item added.

Thanks!

They will probably be working overtime tonight going through the logs to get people their game.

I have the bug, too. Kind of gives a whole new meaning to "mystery games."

Bug is now fixed. Mystery games should be defined by "tomorrow-ish".

http://www.gog.com/forum/general/the_big_winter_sale_starts_now_a558d/post181