I bet, all of you remember this title!
"Blood" was the last game running on the build engine,
thus, it's bloody well made.
It's also the first commercial succes by Monolith,
who later made such great games as "Noone lives forever", or "Tron 2.0".
This one aspires to be no more, than a well designed,
classic KillEverythingThatMoves kinda shooter, with mindboggling level design,
and high difficulty.
...
And I also bet, that none of you played with this game in ages!
I recall trying to run this game under XP, or -god forbid- Vista,
and never got a satisfying result.
If GOG managed to get this thing work again, as smoothly, as we all remember it,
Then that alone justifies the support you give the site, by buying this game.
...even if you're not into 2,5 D shooters.
After you played this, I bet, it'll change!