5.46 GB for me is what stalker took up in HD space.
I also liked Stalker at 1st, then really not like it as well,.....now i'm lovin it again....dang game is kinda like a woman, lol.......just kiddin ladies.
I really am enjoying this game again, i have not patched it because i dont want to lose my saved games....it has taken me too long to get some good weapons.
It does have a few issues, but I can definitely live with them, as long as the fun factor is there.