Fenrir does support multi-disc games, but is unable to switch discs in-game at the moment. Therefore, games that ask you to save before switching discs, will work fine, as you can save your game, power-cycle the console and load the next disc, then load your saved game and continue. Most Saturn multi-disc games worked like this. However, there are a few games that require in-game disc switching. These games are not supported yet, but we are actively working on adding support for those, too.