Just happened to check PS3 games at Newegg and saw they have Dark Void for $10 new. It's available for the same price on the 360 as well.
:ps3: http://www.newegg.com/Product/Product.aspx?Item=N82E16879233037
:360: http://www.newegg.com/Product/Product.aspx?Item=N82E16874129012
First time...