When StarCraft was first released, it broke from the 2 race gaming style and made the first 3-race game.  Every single race in StarCraft is totally different and that makes it very fun.  As we all know, games get boring after a while, but Blizzard made up for that by making Battle.net.  This free multiplayer service is great for battling against people from all over the world, and the UMS (Use Map Settings) custom maps make StarCraft a never boring game.  This game has been rated in top spots by many different people and companies and I suggest you play this game.