While we at Co-Optimus do not generally condone the act of competitive gaming, which, by definition allows you to dominate another player; there is a kind of co-op that does include domination, one we would like to paste a label on. This type of co-op can, if used correctly, be used against that game-hog sibling, spouse or significant other. Co-optimus would like to proudly introduce: B.Y.O.B. (Bring Your Own Bitch) co-op gaming. We've looked at a few examples of games that created the B.Y.O.B. co-op genre, all the way back to the days of the Sega Genesis, and culminate the list with recent entries on systems like the Xbox 360 and Wii.