Perhaps most of them. It is a mistake to just think you can take any game and stick bitcoin into it. That is why we keep most of our bitcoin tools closehold atm. Games are very delicate ecosystems of play and reward. Blindly adding real-world value is more likely to disrupt the balance of the game than improve it. We are VERY intentional about how we add bitcoin rewards to our games and will continue to do so as we help other developers add bitcoin into their games.