Activision & Platinum Games' The Legend of Korra is now available: Nickelodeon and Activision Publishing, Inc., a wholly owned subsidiary of Activision Blizzard, Inc. (NASDAQ: ATVI (http://www.activision.com/) ), combined forces to launch The Legend of Korraâ¢Â a single-player, third-person action video game based on Nickelodeonâs fan-favorite, animated series. Developed by gaming industry leader, PlatinumGames Inc.,