Blizzard has made a very good April Fool's joke about a new Starcraft 2 Terran unit - Tauren Marine. Of course we all understand that there won't be any tauren marines in SC 2 but it was a good joke. Under one of the pictures they wrote "there is a cow level" this may be another joke but when you think about it there was a secret cow level in Diablo 2 and there was a secret tower defense level in Warcraft 3: The Frozen Throne. So it might just be true. I mean they have already made a tauren marine unit, why not put it to use? What do you think about a tower defense maps in SC 2? I would

This is a good defense game. You need to shoot enemy tank so they won't shoot your dirt. Use keys A, W, S, D to move around and mouse to shoot.

Very nice tower defense game. It has it's own tutorial. Just drag the turrets to the spot where you want to build them.

Flash starcraft is a defensive game. You play as the overmind and you need to survive terran and protoss attacks. You can construct defenses and buildings, use abilities to kill advancing units. The game is very well done and you won't be able to tell the difference between flash and the real thing.