This trailer for the impressive-looking Total War: Rome II recounts the Battle of the Teutoburg Forest, where Germanic tribes -- united by the son of a chieftain who was taken hostage as a child and raised in Rome -- ambushed three Roman legions. If that doesn't sound like a good setup, wait until you see what Teutoburg Forest looks like.
The battle serves as a good showcase for some of Rome II's features, including what's being referred to as a "true" line-of-sight system and ambush scenarios. Seeing such a grand game like this in action speaks for itself and often gets me the most excited, though I can still respect the work that goes into making these cinematic trailers. I hope your PC is ready.