Songs advertised not in list.. HELLP

[decomposing1]

So I just bought RB2 last night and on the box and also on the software case it says that there is Battery by Metallica as well as Peace Sells by Megadeth on disk. Well I do not seem them in the list of songs when going to quick play. Am I suppose to do something or does these other songs get unlocked somehow down the road. The booklet that comes with the game is worthless as it says nothing about it. Rock on

Decomposing1

[ultrakill]

Either play through tour mode to unlock the song or use cheats to get it.

[aznman08]

if you use cheats you wont be able to save, play online, or earn trophies/achievements on ps3/xbox 360

[decomposing1]

So you have to tour to get these other songs huh. Thanks for the help..

[dovanon]

You can also do the challenges to unlock the songs. This method is much faster.