This is great expansion for the awesome x-com: enemy unknown, if you like the x-com: enemy unknown you definitely don't wanna let this one slip away from your game library, it gives you more customization and lot of new stuff and new enemy, although the storyline not much different but is enough to give you reasons to play x-com again
If you never play x-com: enemy unknown before and you love strategy game, you definitely have to try this one! nuff said!!!