God Hard mode:
Rotate the Right Analog-stick clockwise or counterclockwise twenty times at the title screen.

Unlock God Hard mode:
Successfully complete the game.

Unlock Trial mode:
Successfully complete the game under the Normal difficulty.

Unlock Challenges:
Complete the indicated task to unlock the corresponding challenge.

Challenge 1: Complete Act 1.
Challenge 2: Complete Act 2.
Challenge 3: Complete Act 3.
Challenge 4: Complete Act 4.
Challenge 5: Complete Act 5.
Challenge 6: Complete all five challenges.