Talk:Research & Development/@comment-26536836-20151018065000

RnD is hard and expensive. But you can do it only for rewards. http://asphalt.wikia.com/wiki/User_blog:Visually/RnD_is_hard_and_expensive._But_you_can_do_it_only_for_rewards.

It's my blog link but too long to write whole thing here.