High Quality Content by WIKIPEDIA articles! Neverwinter Nights 2: Mysteries of Westgate (NWN2:MoW) is an expansion pack for the computer role-playing game Neverwinter Nights 2. It was developed by Ossian Studios and published by Atari on April 29, 2009. The player creates a character and controls it, along with a group of three pre-designed companions, journeying through the game world. The gameplay is very similar to that of the base game. Mysteries of Westgate also includes new monsters, music, and other tools, which can be used by players to create their own Neverwinter Nights 2 levels.