Neverwinter Nights

"Neverwinter Nights is a fantasy role-playing game set in the Forgotten Realms. The game supports both single-player and multi-player modes, and its engine was designed to facilitate a massively multiplayer online game experience. NWN pays homage to the original Neverwinter Nights, the first graphical MMORPG, which operated on AOL from 1991 to 1997."