   [XNA 3.0] What asset types can I use in XBox games?
  I googled for an hour and searched creators.xna.com, but I cant find anything that tells me what asset formats are supported in XBox 360 games.Can anyone tell me or point me to this information?Can you create custom importers and processors that run on XBox?Thanks in advance.   
  Content Importers and Processors don't run on the 360.  They run ahead of time on your PC, when you build your project.  When your importers and processors run they'll generate a compiled .xnb file, and this file can be loaded by a ContentManager on either the PC or the 360.  So any models, textures, effects, and sound effects you have in Content project should load fine on the 360.Custom importers and processors are fine, since again they run on your PC and not on the 360.  You just have to make sure that the final managed output object that's created by your processor is something that can run on the 360.   ;  There's lots of resources out there that show you what you can use in your XBOX games.  This series of video tutorials is a good starting point.  He shows you how to use audio and sound within an XBOX game:http://blogs.msdn.com/dawate/archive/2008/02/05/building-a-3d-game-in-xna-from-scratch-free-video-tutorial-series-now-available.aspxEventually you may want to use custom importers sooner or later to load your own file formats.  There's several tutorials out there that show you how you can achieve this (though most of those tutorials show a basic example)http://www.ziggyware.com/readarticle.php?article_id=69But yeah, you shouldn't have any issue with file formats since they're compiled into .xnb files   