Finish chapter 1
The Journey Begins
Finish chapter 2
Finish chapter 3
Finish chapter 5
Finish chapter 4
Defeat the boss in chapter 1
Defeat the boss in chapter 2
Defeat the boss in chapter 4
Defeat the boss in chapter 3
Defeat the boss in chapter 5
Defeat the leader of all monsters
Complete the ending
Read the mind of 1 infected creature
Read the minds of 3 infected creatures
Read the minds of 2 infected creatures
Collect all Memory Fragments
Read all minds
Rip off 50 monsters' heads
Find all hidden areas
Finish Campaign on Easy Mode
Finish Campaign on Normal Mode