Complete Campaign mode to unlock new difficulty levels, options for infinite ammo, infinite grenades, double health regeneration, and the character, environmental, and weapon concept art at the "Extras" menu.
ACHIEVEMENT - HOW TO UNLOCK Clingy (25 points) - Kill 15 enemies in a row by grappling them. Combat Veteran (25 points) - Kill 250 enemies in the campaign. Compat Experience (10 points) - Kill 50 enemies in the campaign. Dead-eye (50 points) - Complete any mission with an accuracy of 80% or higher on Normal or higher difficulty. Defender (20 points) - Help defend the barricade in New York on Normal or higher difficulty. Dolly Madison Award (20 points) - Save the Constitution from being burned on Normal or higher Difficulty. Environmentalism (15 points) - Complete 40 environmental or grapple kills. Exploding Monkey (20 points) - Kill at least Four enemies with one explosion. Going Nuclear (30 points) - Rewire an Atom Bomb on Normal or Higher difficulty. Gravity is a Harsh Mistress (5 points) - Toss a paratrooper onto the streets below New York. I Saved the General (20 points) - Rescue General Donnelly from the D.C. courthouse on Normal or higher difficulty. Impeached (30 points) - Oust the false President from office. Master Sniper (35 points) - Kill 10 enemies in a row with a headshot. Need a Ride? (20 points) - Meet up with the rescue team in Washington, D.C. on Normal or Higher difficulty. Oh, the Humanity! (30 points) - Destroy all the assault blimps at the Tower Bridge. One Man Army (45 points) - Kill 400 enemies in the campaign. Presidential Citizens Medal (75 points) - Complete the campaign on Hard difficulty. Presidential Medal for Merit (35 points) - Complete the campaign on Normal difficulty. Presidential Medal of Freedom (100 points) - Complete the game on Insane Difficulty. Reservation for One (5 points) - Make your way down to Hotal Langteau on Normal or higher difficulty. Run! (25 points) - Sprint for a total of 30 minutes throughout the campaign. Save Yourself (25 points) - Escape from New York. Sharpshooter (10 points) - Kill all the paratroopers as you make your way down the skyscraper. Stowaway (30 points) - Sneak onto the Zeppelin on Normal or higher difficulty. Swirly Time! (5 points) - Drown a German in a toilet in the Tower of London. Turning Point (25 points) - Complete the campaign. TV Repairs (5 points) - Smash an enemy's head through a TV in the White House. David and Goliath (30 points) - Win a ranked match against someone 100 or more leaderboard ranks above you. First Time for Everything (5 points) - Finish a multiplayer game. Killer (20 points) - Get 100 ranked match kills in any mode. Killer Instinct (30 points) - Get 500 ranked match kills in any mode. Maybe I Should Go Outside… (40 points) - Get 2500 ranked match kills in any mode. MVP (15 points) - Win an 8-player ranked or player match in Team Deathmatch mode with the highest score. Next Time Take the Stairs (5 points) - Fall to your death during a multiplayer game. One in the Chamber (10 points) - Kill a player in a ranked match with the last bullet in a pistol clip. pwnt (15 points) - Finish an 8-player ranked or player match in Deathmatch mode with the highest number of kills. Stayin' Alive (25 points) - Finish a ranked match in Deathmatch mode without dying. Team Player (25 points) - Win 20 ranked matches in Team Deathmatch mode. Uberdork (25 points) - Win 5 ranked matches in Deathmatch mode. World Tour (15 points) - Finish a multiplayer game on every map in every mode.