[2001] Underground 1.0 (Hybrid Theory EP reissue) | ||
[2002] Underground 2.0 | ||
[2003] Underground 3.0 | ||
[2004] Underground 4.0 | ||
[2005] Underground 5.0 | ||
[2006] Underground 6.0 | ||
[2007] Underground 7.0 | ||
[2008] Underground 8.0 (Mmm...Cookies - Sweet Hamster Like Jewels From America!) | ||
[2009] Underground 9.0 | ||
[2010] Underground X | ||
[2011] Underground Eleven |