Musician, ChemE, Squeegee.
Regain your health after nearly dying.
Die without killing a single enemy.
Let history take its course.
Destroy 500 enemies.
Destroy 6 tanks.
Don't skip any of the in-game cutscenes.
Stay alive for 50 hours.
Take out least 5 enemies with one explosion.
Launch your first mortar strike.
Kill 100 footsoldiers.