Clear CHAPTER 1 on any difficulty.

Clear CHAPTER 3.

Clear the Great Whirlpool in Arcade.

Clear the Cave in Arcade.

Clear CHAPTER 1.

Complete a "TWIN SHOT".

Sacrifice Irish to save the Valkyrie in the Campaign

Complete the Suez mission in the Campaign

Obtain 6 000 points in the Suez mission in the Campaign

Obtain 15 000 points in the Tashgar mission in the Campaign

Find 15 collectibles in the Campaign

Complete the Kunlun Mountains mission in the Campaign

Get 5 kills with Shank in the Kunlun Mountains mission in the Campaign