Guitar Hero: Smash Hits

While the song unlocking process is somewhat similar to Guitar Hero: Metallica, you will eventually have to play the other 47 songs in a given career to unlock Through The Fire and Flames. Completing that song on every instrument at the end of career mode will unlock this achievement.

This achievement is obtained by completing career mode with all four instruments individually. On Guitar, Bass, Drums and Vocals. In order to complete the career mode all 48 songs (including Through the Fire and the Flames) must be played at least once using each instrument.
This achievement shouldn't cause too much trouble as it can be obtained on any difficulty but if you are finding it difficult either change to a lower difficulty (depending on the current difficulty setting) or enter practice mode where songs can be slowed down and broken up.
Note: All 3 peripherals are needed: Guitar/Bass, Drums (both Rock Band and Guitar Hero ones work) and Mic/Headset
Hope this solves any confusion.