As we wait for the October 5 release date of Orcs Must Die!, Robot Entertainment recently put out a developer diary on the overview of the game. Not only do you get to peek into the development process but you also get to check out some neat concept art from the game, not to mention previously unseen enemy types. Robot Entertainment also divulge their favourite traps and skill trees in order to kill those pesky orcs. Keep a trap handy for when those orcs come in October.