What are those albums? I've seen them few times in the stores in my city. I can't understand, are they official or not. On the www.linkinpark.com there are no such albums. So are they just albums with songs that didn't come to any of previous albums, or it's something else? Who can answer my question?
Under Attack is a bootleg that consists of some unreleased LP songs, a remix or 2, some Grey Daze songs, and a couple songs by other bands that are labeled as LP. It's obviously not official. Erection is just Meteora plus 12 songs by another band on one CD, again, not official. The Underground albums (2.0 and 3.0) were given to the LP fanclub as a joining gift. However, watch out for fakes, LPU 2 has 6 songs on it, LPU 3 has 5. Some people try and sell a fake "LPU 2.5" that has like 13 songs.