Our latest list takes us into the belly of the beast! In this outing, we're looking at levels that are set inside living organisms! In some cases, this means venturing into colossal creatures. In other instances, it requires our heroes to shrink themselves down to microscopic levels. In either case, the concept allows for some of the most inventive, grotesque, and downright bizarre experiences in gaming history. Click on the image if you're ready to embark on a fantastic voyage!