Since Haloween is so close, horror games should make it big during the day. Who doesn't wan't to play Left4Dead, Dead Space, Amnesia, Fear, Bioshock! I would love to see one of these games or their sequels in this site for giveaway please!
If that's not possible remember System Shock 2 from 1999 that have been critically praised as one of the Best Games ever made, also including the Best Horror game ever made. It still gives creeps even for people in this century. Probably it's more easier to give this game for giveaway. Or you could also possibly consider the indie game Limbo!
