Complete the Trainyard mission in a single player campaign.

Use a special move

Complete the game on Easy Difficulty

Destroy the gas station

Kill 15 enemies on the HMV turret

Shoot off 100 Helghast helmets during battle

Complete Salamun Bridge on any difficulty level

Kill 30 Helghast using the StA3 fixed gun emplacement

Complete Blood Meridian on any difficulty level

Complete Corinth River on any difficulty level

Find one secret

Complete 10 Levels in a Row

Start a chain reaction with a bunch of cannons