I have a bit of a graveyard of old comps here lol...
c64, c128, broken speccy, 2 amiga 1200s, Jaguar, n64, Gamecube, GB, GBC, GBA...
Literally a graveyard too...need to sort them all out sometime:/
(or fix them and set them up so I can play old games again)
I LOVED Barbarian on the c64...I was a fiend for it...
Flying neck chop every time...nobody stood a chance hehe:)
Final Fantasy Tactics Advance - you're going to LOVE that. Although I had to sit through about half an hour of story and brief tutorials, once you get into it, well, it's damn good. You know the thing, basically just battles, and looks great.
Barbarian though, it was the best hack n slash game on the C64. Did you ever play Barbarian II? Same sort of thing, but you wandered about slashing away rather than being in an arena.