Steam now offers the Challenge Pack DLC for Ghostbusters: Sanctum of Slime, adding new content to the movie-based action/adventure. Word is: "Ghostbusters: Sanctum of Slime Challenge Pack brings hours of a new single player experience to this ghost-hunting adventure and has 2 new modes! Lonely Hero allows you to play through any unlocked level without the help of others and Arcade Mode limits the number of lives to see how you skills line up on a distinct Global Leaderboard."