I am working on a same kind of map :D But my castle is more like a fort. Ideas? make it breakable! What i did, is make the walls a func_breakable, and when it breaks, a point_template spawns a load of pieces of stone. These will be removed after a couple of seconds. Siege weapons? In the map i'm working on, i've got now: a catapult, battering ram, balista, large canon, small canon. When you press a button, all the parts of the selected weapon will be spawned, and it is up to you to constrain them together to make it functional. I hope you could use some of these idea's.
By the way, your castle is awesome. Really nicely done. Is there a game mode coming along with it?
Thanks for all the ideas!
Well, i'm not going to make a gamemode myself (cause i can't) But let's hope someone does :)