Customized ZEKE's head parts and foot parts with special AI weapon parts.

Cleared all MAIN OPS and EXTRA OPS missions at Rank S.

Cleared all EXTRA OPS missions at Rank A or higher.

Cleared all hunting quests.

Heard a ghost on the radio.

Acquired Infinity Bandana. Never worry about running out of bullets ever again.

Cleared all MAIN OPS missions at Rank S.

Defeated all AI weapons.

Threw a chaff grenade at ZEKE (single player only).

Assembled all special staff members.

Nicely cooked a ration.

Reached 100 hold-ups.

Reached a total of 20,000 or more Camaraderie.