Scratch

http://scratch.mit.edu/projects/lukanater/2387930
Orc Onslaught, a interesting new take on the strategy game genre.

In Orc Onslaught, you start by dragging checkpoints around your base.  When you drop down a checkpoint, soldiers will be dropped from the last checkpoint to the one you just dropped. These are red dots.  You can create 400 soldiers, which should be about 5 checkpoints.  You can see your soldiers in the "moves" box down on the HUD.  Once all the soldiers have been dropped, or 30 seconds have passed, out will come the orc onslaught.  There will be eight purple circles, these are orc hordes.  If they hit on of your soldiers, they will kill a small amount of soldiers around them.  After eight orcs have passed, the siege machine will come.  You must destroy the siege machine.  If the siege machine can cross your field without dying, you lose.  If you destroy it, you win that round.  If you win 5 rounds, you win the game.

Try it out, very addicting.