Metal Sonic Rebooted is a complete heavy modification of Sonic the Hedgehog 2 with extensive amount of new art, layouts, mechanics, music, and features that in total creates a different experience.ĭr'Robotnik has built an advanced army of badniks to search for the Chaos Emeralds, and it's up to Metal Sonic to find the emeralds before them by destroying everything in his way to show Robotnik he shouldn't be replaced.