Cheat Codes:Activate the following cheats by entering the corresponding sequences of buttons at the specified screen: Mission select – At the mission selection screen, while holding LT RT Back, slowly press Y, RB, Y, RB, X.Scott Mitchell invincible – Pause the game, then while holding LT RT Back, slowly press Y(2), X, RB, X, LB.Team invincible – Pause the game, then while holding LT RT Back, slowly press X(2), Y, RB, Y, LB.100% health – Pause the game, then while holding LT RT Back, slowly press LB(2), RB, X, RB, Y.Infinite ammunition – Pause the game, then while holding LT RT Back, slowly press RB(2), LB, X, LB, Y.Unlockable weapons:To unlock the Falcon weapon, destroy 100 helicopters in Multiplayer mode.To unlock the Sniper Rifle, get 500 head shots in Multiplayer mode.Warfighter difficulty:To unlock Warfighter difficulty, beat the game. Belly slide:To perform a slide on your stomach, while running click and hold the Left Analog-stick.Achievements:Complete the training mission (25 points) – Beat the training mission.Heavyweight in multiplayer (24 points) – Get a total of 10,000 kills in multiplayer.Deadly in multiplayer (20 points) – Get 4 kills in 4 seconds or less in multiplayer.Unyielding in multiplayer (32 points) – Get 30 kills before being killed in multiplayer.Falcon in multiplayer (16 points) – Shoot down 100 helicopters in multiplayer.Sniper in multiplayer (36 points) – Get a career total of 500 head shots in multiplayer.Committed in multiplayer (28 points) – Play for 8 hours straight in multiplayer.Master of Ceremonies (24 points) – Host at least 1000 matches.Coop 1-1 (8 points) – Win missions in the cooperative campaign.Coop 1-2 – Win missions in the cooperative campaign.Coop 1-3 (8 points) – Win missions in the cooperative campaign.Coop 1-4 (8 points) – Win missions in the cooperative campaign.World Champion in multiplayer (40 points) – Climb to the top of the universal leaderboard.Solo champion in multiplayer (32 points) – Climb to the top of the solo leaderboard.Team champion in multiplayer (32 points) – Climb to the top of the team leaderboard.Reach Ramirez under normal (25 points) – Reach Captain Ramirez