This Is a Hang em high vaiant It has a lot of ai i would say at lest 25 to 40 at one time most have the best acracy you could have 
its a team game Elites VS Marines VS sentanels you can join the Elites by joining Blue and manies by joning red they will get in 
turets and there are some comand lists they will run. Heres a clip http://video.google.com/videoplay?docid=4430744521013149861&hl=en