 The game included the so-called "Aurora toolset", a collection of tools allowing users to create their own digital adventure modules to be played either in single-player or in online multiplayer.The toolset enjoyed great popularity among the modding community, with over a thousand fan-made modules produced in it within half a year after the release.Obsidian Entertainment (successor to Black Isle Studios) used an updated version of BioWare's Aurora, titled "Electron Engine", to produce "Neverwinter Nights 2" (2006) and its three expansion packs (2007–2009).