Location not disclosed
All levels on Xtreme Mode (no easy or crazy cheats)
Fail to get at least 1.000 points
Complete the 'Forest' level on Adventure Mode.
Complete the 'Deserted Beach' level on Adventure Mode.
Click on both the Credits Heads
Play with cheats
Complete Act 3
Complete Act 2
Complete Act 1
You found and unlocked Secret Music Track2!