You get a Steam key delivered by OnePlay.
The release date for the game is September 2, 2013.
Note that this deal is eligible for referral credit. So, for every referral, you can earn a $10 credit. What you could do is refer a friend. They buy for $45. You get $10 credit. You buy for $35. You send your friend $5. The game ends up being only $40 for each.