Earlier this week Sega announced plans to offer up an Imperial Edition of an upcoming historical RTS game Napoleon: Total War. However, that's not the only special offer that's associated with the latest game from developer The Creative Assembly. The Steam download service has a couple of extras if you should buy.

If you purchase the standard game via Steam, you will be able to use the exclusive Royal Scots Greys elite unit in both single and multiplayer modes. If you decide to spend some more money for the Imperial Edition you not only get the extra unit you also get something immediately; a free copy Medieval II: Total War to play while waiting for the game's release.