Play MU Online in your browser. No download. No installation. Season 4 | Dynamic EXP x100 / x50 / x25 / x15 | Master EXP x25 | Drop 30% | Max level 400 + Master level 200 | Reset at 400 (back to level 10) | PvP | English. Works on PC, Mac, Linux, Android, iPhone and iPad. Try it as a guest in one click.