High Quality Content by WIKIPEDIA articles! Neverwinter Nights 2 (also known as NWN2) is a computer role-playing game developed by Obsidian Entertainment and published by Atari. It is the sequel to BioWare`s Neverwinter Nights, based on the Dungeons Dragons pencil and paper fantasy role-playing game. Neverwinter Nights 2 utilizes an adaptation of the Dungeons Dragons 3.5 edition rules.