The "City of Heroes: Going Rogue" expansion's release was announced on May 11, 2009. This part of the game centered on the alternate reality of Praetoria and featured a new alignment system allowing players characters to shift allegiances between Heroes and Villains, giving characters access to both Paragon City of "City of Heroes" and the Rogue Isles of "City of Villains". Paragon Studios described this as " the shades of gray that lay between Heroes and Villains". "Going Rogue" was released on August 17, 2010, with pre-purchasers able to play on August 16.