FliplineStudios The Steam overlay requires no work - it just works. But something to keep in mind is that the overlay will freeze if there is no animation happening in the Flash display list - so you need to have some animation somewhere at all times to keep it updating. With Starling I haven't noticed this issue though. Other Steam features are not required (you don't even need any DRM), but achievements and cloud saving are quite popular. Cloud saving is just a case of specifying which files in the installation folder should be backed up by Steam - super easy if you choose to do it this lazy way.