Ive played through pretty much the whole game the campaign most of the crusader trail and the historical battles and i don't recall any secret maps and i never bother with cheats (it is a Rts but it does sound pretty cool) so if u feel the urge to play the game buy the original stronghold great campaign and it has a great siege game type or for something newer stronghold 2 which is actually pretty good . stronghold the original one can be found from any used store that sells games gaming stores that sell games are the best (Eb doesn't carry them in stock anymore and i don't know if they carry stronghold 2 they should though but if not there is stronghold legends many options to choose from ) there pretty cheap especially the original which i say is the best one (sorry bout so much info that doesnt seem to be oh so helpful but its better then no requests)
Miguel Sa