"Any map makers knows that making a good Siege map is harder than making a good FFA or CTF map, after all."
Which is why there is only like 5 siege maps made......
Xiron - If you read the thread, you would see that there is a chance it is a co op mode, but that it may have not been anounced yet.
Last.FM - Ow, give up the funk
Let the truth of love be lighted
Let the love of truth shine clear
Armed with sense and liberty
With the heart and mind united
In a single perfect sphere