Can you put panty shots in your game? Absolutely. Should you put them in your game? Not in this instance, no.

If it's going to be a pornographic game, fair enough. It is what it says it is and everyone consuming it expects sexuality. Slipping them into a perfectly standard RPG is just sad though. Do you have such little faith in your game's ability to captivate your audience that you have to resort to the lowest common denominator? Fair play to them for recognising the cultural differences and tailoring their product to their intended audience.