SEGA has updated its Medieval II: Total War demo, adding a new map to play with.

Medieval II: Total War screenshot

The additional map is the Battle of Otumba, in which you travel to South America and wage war against the Aztecs. This joins the already available Battle of Hastings tutorial, the Battle of Pavia and the Battle of Agincourt.

I'm afraid that if you want to play the new map you'll need to download the demo again, which weighs in at 640MB and is available over on SEGA.com.