According to Game Informer magazine(December issue) Bill Murray, Dan Aykroyd and Harold Ramis have all come together and started work on a Ghostbusters video game. The story will take place after the events of Ghostbusters 2. The game is being developed by Zootfly(primarily a strategy game maker). Earlier reports from Dan Akroyd said the game would play like Gears of War with a very gritty feel to it. The game should release sometime next year for all major game consoles. The screenshot featured is on the cover of Game Informer.
