Wow, 1998 was a good year for Amiga games.
My nominees (not counting titles that's allready been nominated):
Alternate Reality: The City
Space Quest II
hmm, that's it I think, but I noticed this while looking through HOL: Puppy Love, http://hol.abime.net/?id=3902
, what on earth is that?!? (edit: see thread in old rare games requests)