They aren't supposed to have it according to Luke Smith, who was quoted in saying that the Alpha Lupi was the only Titan exotic chest. Now that I think about it, that alone proves that it isn't in the game (isn't supposed to be). Neither are the rest of them. I don't care if 3 people have the tarantella. If only a few people of millions have something, they probably aren't supposed to have it, you know?