Mars track(s)
Pause game play then press Left(2), Right(2), Left(2), Right(2), Down, Left, Right.
Play as a Martian
Press Right, Left, Right, Up, Down, Left, Right, Up(2) at the main menu (front end).
Wide-angle mode
Pause game play then press Left(3), Right(3), Up(3), Down(3), Left(3), Right(3).