Jamiebourne: Upon checking my games list and cross checking the games I actually have purchased from GOG against my emailed receipts, I've found that they've lost at LEAST 5 orders for games that I've purchased.
Sorry if this was mentioned already, but which games were they? I recall this has happened a few times for a short time (e.g. when a game was removed from a GOG store, it might go missing from people's accounts as well for awhile (but come back later)... and then there was that darn Fallout which kept disappearing and reappearing to people's accounts many many times, people even starting joking about it).
But the thing is, if a game went vanishing even for a short time, it would vanish from
all accounts. If some game disappeared only from one user's account, then IIRC it was always a case of GOG revoking a game which was bought from a third-party site like G2A (and was originally e.g. bought with a stolen credit card, and then the GOG code was sold to the current user).
There were also a few cases where people had just forgotten they had bought certain games on another GOG account, but I presume you've made sure this is not the case in your case.
gogrepo.py is a good tool for checking that nothing goes missing, providing you have downloaded all your games with it before. If some game would vanish from your account all of a sudden, then gogrepo (the "clean" command) would mark those games/files as "orphaned" (the games/files are moved to the !orphaned directory on your hard drive). Then you can check yourself "hey, why were these files moved to the !orphaned directory, when they were not replaced with newer files?".
timmy010: You mean that they pulled your games and your accounts receipts? That's worrying. I have a local backup of every single one of my games but when your library number in the hundreds, it's difficult to compare every game and dlc
With gogrepo it is easy (automatic), providing you keep a local backup of all your GOG games (because it compares the new info it gets from the GOG, to what you already have on your hard drive).