Halo. Diablo. Gears of War. Each of these franchises feature co-op, and each of them are legendary. They are also violent, grim, and gritty, for the most part. For Co-Op Classics today, Co-Optimus will look at a co-op game at the opposite end of the spectrum. There are no bullets, demons, or chainsaws in the world of Bubble Bobble. But you won't care, because there is some top notch co-op here.