Is the two player mode fun in that game? Been thinking of picking that one up, as I've been on a shooter kick lately, and wondering if I could get the wife to play
Actually, it is.  That is until the last level.  The last level is full of cheap run-into-walls deaths, and 2 players getting cheap deaths burn through your 
continues credits MUCH faster.  Up till the last level, though, its somewhat difficult but good.  I recommend getting it, although I would put both Hellfire S, Salamander, and definitely Sapphire ahead of Aero Blasters in the 2-player shoot-'em-up fun game category.