I know this is a bit of a derail, but the "scientist" inside me had to speak up
That's ok and you are probably right, in the end it would just be more depressing if it really were only 5% the thing though, is that if a steam profile is set to private, achieved achievement stats do not count into the global, but the ownership count still counts into the global, hence why I don't think achievement stats are 100% correct. Someone who played offline is never counted in those numbers either, something you could do with D:OS...
So yep, we are basically guessing and 5% or 10%.. it would be depressing all the same considering how many backers this had. ;p I know quite a few people that stopped played for the above mentioned reasons too.. so yeah
