I only played the demo for SF, but I liked it a hella-lot. Metal Gear, on the other hand, I've beaten about 6 times (when I went for number 7, I found that my game had been erased; my brudda sleeps wit da fishes now).
Shadowrun for SNES? When I found out my head had a time limit on it, I nearly crapped my pants. At the end the big dragon guy said there'd be a sequel. Was there? I think there was...