For all the people complaining about having to like the game on facebook for missions, aside from being insufferable whiners, should know that you don't actually have to do it. Its enough to click the link in the game without actually liking anything. Actually this works pretty much universally in games with those sorts of buttons.
 "Rocket Santa 2"){kind=icon}
 "Dibbles 4: A Christmas Crisis"){kind=icon}
 "Papa's Pizzeria"){kind=icon}
 "No Time To Explain"){kind=icon}
 "Pandemic 2"){kind=icon}