A combination of different game styles, Orcs Must Die! is a mixture between an action and tower defense game. For those unfamiliar with the concept, tower defense games such as Plants vs. Zombies, involve trying to prevent enemies from crossing the game screen by building towers that allow you to better shoot at and kill them. This multi-genre aspect gives Orcs Must Die! a rather addictive and challenging quality that many gamers will enjoy. In Orcs Must Die! players need to be smart about how they're going to build up their towers to ensure the approaching orcs don't flatten everything in their paths. This requires strategy as well as gaming skill. In addition, you can also kill the enemies in Orcs Must Die! the traditional action way, by shooting arrows at them and engaging them in combat with a sword. In this sense, Orcs Must Die! is also an action game that lets you show your agility with gaming controls in order to best your enemy. You need to have Steam installed on your computer to play this game, which might be a downside for some. The levels also get increasingly trickier the further along you manage to go. Orcs Must Die! is a highly addictive mix of action and tower defense that any fantasy loving gamer will enjoy.