the xbox live avatar thing i understand, could always have an avatar customizer for the content you would unlock within the game. with the banner towers couldnt that just use steam userpicture or am i remebering them wrong. and the unlocking content based on other games you own depending on the games you could just use steam to check, if its games that arnt on steam yet then there would be an issue there. and the collectible progress i dont understand what you mean by message payloads. and anyway id asume that when the chance rises to be able to work on porting or making your own games again that you wouldnt want to just have it be a port and rather it be a special edition which could lead to just reworking features for steam and having new content ofcause