Basically create an extension for GameMaker Engine which will allow us to display Chartboost ads (all formats). Should work on both Android and iPhone.
Another user tried to create one for Android with the old Chartboost sdk: [url removed, login to view]
The basics are expected, like show interstitial (static and video) ads and show more apps. Also all the buttons should work, back, pause, etc. Finally need a function that will tell if ad was shown or not.