devoreaux: I want you to ask sth. If I buy blood from this website, is it somehow better optimalized for Windows?
It's not particularly optimized, you could replicate what GoG has done with your Blood CD, DOSBox and NSIS, you could even tailor your Blood installer to your own liking by including a custom build of DOSBox and BMouse and key bindings. However consider the following:
1. If you buy from GoG, you would be supporting GoG and DRM free gaming.
2. GoG offers future re-downloads at no charge. If you buy Blood from Atari.com, they have an additional fee of $3.95 for an "Extended Download Service" If you role your own you will have to keep track of it or redo it at a later date.
3. You would be sending the message that there is still an interest in Blood. Jason Hall expressed interest recently about doing a new Blood game, but it fell through (most likely due to Atari's bankruptcy).