The game in question is almost certainly Garrison by Rainbow Arts. The Amiga version is much preferred over the C64 version.

> I recall way back in the 80's there was a Gauntlet type game for C64 that
> received much acclaim at the time. Good reviews etc. I remember wishing I had a
> C64 to play it. It may have been released by Electronic Arts, not sure, but I
> think it had that flat square packaging EA used,