Heat Sig is a mixed bag for me as well. On one hand, it starts as a fun game and has some really "oh shit" moments as well. (breaking a window to kill an armored target in the vacuum of space was a good one for me.) But aside from that, it starts to get really repetitive after about three hours or so. 3 hours for 15 bucks is still a better deal than a movie, but I don't know if it's worth full price.