Like the other 2 Team Fortress 2 updates, Day of Defat Source will let you play the game, for free this weekend:
http://www.steampowered.com/dod/palermo/
The details of the new stuff in the game are in this site. Have fun in the 1940s!
http://www.steampowered.com/dod/palermo/
The details of the new stuff in the game are in this site. Have fun in the 1940s!