By the time I get to the bottom of this thread, ready to post, my list is massive thanks to all the ones I've been reminded of. Level 5, Square (Enix), Bioware and Bethesda are excellent. But there are others, like Valve, Atlus, Nippon Ichi, Camelot and the usual Capcom, Konami etc etc that I just haven't played enough games from to rate them correctly.