Unlockable difficulties:
To unlock “Impossible” difficulty, beat the game on “Hard”. To unlock “Nightmare” difficulty, beat the game on “Impossible”.
Trophies:
Bronze trophies
Combo Mania – Complete 3,000 chains.
Destroyer – Kill 50,000 enemies.
Fierce Fighter – Play 5 minutes without losing any health.
Hidden Passage – Collect 4 keys in each world.
Kettenfahrzeug destroyed – Complete the 1st world.
Mankind saved – Complete the 5th world.
Master the Menace – Complete the 2nd world on rank “S”.
Top Scorer – Reach a score of 2,000,000.
Windgeist defeated – Complete the 4th world.
Impossible unlocked – Complete the fifth world on “hard”.
Nightmare unlocked – Complete the fifth world on “impossible”.
Silver trophies
Ultimate Key Collector – Collect the 20 secret keys.
Gold trophies
Galaxy Superstar – Reach ultimate rank 15, galaxy superstar.