Heard a ghost on the radio.

Acquired stealth camouflage. Never worry about being detected ever again.

Reached 50 or more game overs.

Performed CQC six times in a row.

Defeated all AI weapons.

Cleared all hunting quests.

Shot enemy right in the middle of the rear end.

Attacked enemy soldiers by blowing up an oil drum or truck (single player only).

Obtained Rank S on a date with Paz.

Cleared Chapter 4: The Illusion of Peace.

Rolled 100 times or more in a single mission.

Reached 300 Fulton recoveries.

Carried out a mission in OUTER OPS.