Item description:

Level 6 - Superhuman Difficulty

Trophies Earned:

City That Never Sleeps (IF not earned already)
Complete 6 levels on Veteran difficulty

Heart of Darkness
Complete 6 levels on Supersoldier difficulty

Instructions: Resume Game

Switch has already been done, Leave the portacabin (hut),
and make your way to the back entrance under the church


Level 12 - Superhuman Difficulty

Trophies Earned:

Evolution (IF not earned already)
Complete 12 levels on Veteran difficulty

Medal of Honor
Complete 12 levels on Supersoldier difficulty

Instructions: Resume Game

Drop the HMG, go over to the switch to open the gates,
and get in the front Armored car


Level 19 - Superhuman Difficulty
You can get it from here (Credits to Fizzishin):
Downloads/id=50995/crysis-2-all-s...-save.html