If you want another underrated game not many people played... try Terranigma for the SNES which is my #1 game, not just RPG.Worr Monger said:#5 SECRET OF EVERMORE - Ok.. so I'm betting most people HAVEN'T played this.. if not, you missed out. Similar to Secret of Mana... but darker, more mysterious, less of the Final Fantasy feel (good in my opinion)... and one of the greatest soundtracks ever made to boot (Jeremy Soule's first video game soundtrack.. and my favorite next to Morrowind). Possibly one of the most underrated games of the 90's... had such great settings... It was too short though. But a true gem. It deserves more respect.
Others I liked that haven't been mentioned:
Temple of elemental Evil: Pc Rpg à la Baldurs Gate
Gorky 17: An old turn-based Rpg for the pc, with a sci-fi setting
These may be not my all time favorites, but all the others were already mentioned several times.