The first one I got to actually play was Bards Tale 2 on the spectrum. D&D dungeon crawl with a party. Quite advanced for the time I think...and better than the rubbish 'new' bards tale that came out, which was a completely different game!
Then followed by SSI's 'Pools of radiance.' Now that was a great game...(the old amgia one, again not the 'new' rubbish one!!)