Its very poor of people who review games based on demos, the full game offers so much for a portable title, would seriously be amazing if it was a ps3 game too. there so much you can do. you have your main mission based stuff, side ops, micro management of your base which is really fun, these include putting soldiers into the right staff unit, outer ops which you can send a group of infantry on a world mission to help other countries, which rewards you. you have a research team to develop new kit and also your building your own metal gear! ;) the co op side is really good, your encouraged to use the co op element as it really helps on the many boss battles and side ops. if you have a ps3 take advantage of the adhoc party feature or if your friends have the game/psp.