Defeat 20 enemies with Fang

Complete Year Four Story Levels

Use the Time-Turner

Knock over ten characters using a ride-able object

Defeat 20 spiders with Ron

Turn the sound down to 0 and music off in the options menu whilst in the library

Complete the campaign on Veteran

Find and use all Armaments in Open Combat Missions

Destroy an airborne enemy helicopter with a Mortar Strike

Defeat a Warlord in MWZ

Reclaim your gear from a Tombstone in MWZ

Kill 500 Enemies using an Insured Weapon in MWZ

Complete Act III in MWZ