Coming June 1st on Xbox Live and PC Download the Sanctum of Slime Challenge Pack. This add-on adds new difficulty levels and a new game play mode which allows for a more single player style of game.
New Game Modes.
Arcade Challenge: Designed for seasoned gamers, Arcade Challenge gives players a limited number of lives to see how their skills line up on a distinct Global Leaderboard. Players run through 5 of the game’s most challenging levels in single player mode and once the lives are up, the game is over. Player scores are automatically posted to a new real-time Leaderboard.
Lonely Hero: Players can select any level they have unlocked and start from there but this time you are on your own - no co-op, no friendly teammates- just one player to combat the waves of the paranormally possessed.
Ghostbusters: Sanctum of Slime Challenge Pack will be available on June 1, 2011 for $1.99 or 160 Microsoft Points.