"Mobile devices are changing very quickly, some people are changing their phones every year. I think it depends on what really happens with these mobile devices, what happens on the Apple Store, how Android works and what kind of store front they have and how popular those apps become," says id Software producer Jaspm Kim (Jason Kim). "There are so many different ways that this could go and it's not totally clear to us but we put something out there and I think it's done really well for us."