Win 5 rounds in a row in Team Deathmatch

Complete the game on Casual

In the final duel with Maddox, kill him with the first shot ("No Loose Ends")

Complete Act 2

Kill Major Vladic ("And Justice For All")

Kill all enemies in the beach houses without causing an alarm ("Leave No Man Behind")

Take 50 headshots in single player

Kill 25 enemies using thermal or night vision goggles

Rescue the friendly ("From Out Of Nowhere")

Finish the game on Normal difficulty.

Complete Act IV.

Stop Menendez once and for all.

Escort the president to the secure location in downtown LA.