Neverwinter Nights (NWN) is a third-person role-playing video game and is set in the fantasy world of the Forgotten Realms campaign setting, with the game mechanics based on the Dungeons & Dragons 3rd edition rules. The game engine was designed around an internet-based model for running a massively multiplayer online game (MMOG), which would allow end users to host game servers. The intent was to create a potentially infinite massively multiplayer game framework. This game was named after the original Neverwinter Nights online game; the first ever graphical massively multiplayer online role-playing game (MMORPG), which operated from 1991 to 1997 on AOL.