Nothing better then a TD. I think the grange first appeared in "Starcraft". Anyway, best TD maps are from WarCraft. You can find thousand of TD maps on the internet.
I have always been a fan of TD I discoverd it way back when Frozen Throne was new. anyway there is this new 3D tower game called downtown defender that gives more of a 3D experience, I enjoyed it, has anyone else given it a try?