This game is an expansion for half-life that could have more time put in it. There are many downsides to this expansion. One is the game time its about two hours if you can play it really quick and few points were you want to take the disc and break it. Plus the lack of multi-player action and then there is no boss just a squad of grunts you have to run through or kill. When you play half-life you know there is a big difference in the difficulty and you get to play in an alien world where in blue shift you just look at Xen for 2 to 5 seconds. Basically Gear-box and Valve could have put a few more months in to it.