Altered Beast isn't bad but the thing is that it's a tad slow compared to other games in that "sub-genre" (Spartan X, Vigilante, Bad Dudes, Black Belt etc), rather than being frantic action it's a slower memorizer approach, with a slow autoscroll.
As for belt-scrollers, Renegade was more important than Double Dragon and more fun too imo even if it's pretty short.

