I grew up playing this game.  Blizzard does an amazing job at creating memorable games and this is no exception at all.  Star Craft is a true gaming classic and great.  It is a Real Time Strategy game, meaning that you don't take turns like you would in RISK but you have to manage your forces and be ready for the enemy forces at any time.  The game puts the Terran vs the Protos, vs the Zerg.  Each of the 3 races are 100% different and unique in their play style.  If you haven't played this before... WHAT ARE YOU WAITING FOR??