Achieve a rank of Chief Sergeant.

Defeat the Kraken in the single player Campaign.

Complete 5 missions with a full party of 8 in the Cooperative campaign.

Complete one mission on each region in the Cooperative campaign.

Collect 50 pieces of gray tech in the Cooperative campaign.

You unlocked the special ability of buying guns from Little Jacob.

You made a taxi trip from one island to another without skipping.

You were successfully promoted up a rank in multiplayer.

You completed the mission "Uncle Vlad".

You were invited into your girlfriend's house.