- QR code in Chapter 5: Heartland
In Chapter 5: Heartland, there is a QR code that appears during the mission. When captured with a phone with a QR reader, it will load the site at 'http://aug.me/SymB9t', which features wallpapers and videos from THQ.

- Achievements
Do the following things to obtain the corresponding Gamerscore points:

10 Points
Stairway to Heaven	From the front door of the church, make it to the crowâ??s nest in 240 seconds in Chapter 5
Mercy	Kill 5 enemies while they are on fire in Chapter 3
Good Use of Cover	Destroy the first sentry without taking any damage in Chapter 2
Overwatch	Finish chapter 6 in the Single Player Campaign.
Speed Demon	Hijack the tankers in less than 8 minutes in one life in Chapter 6
Heartland	Finish chapter 5 in the Single Player Campaign.
Chronicler	Find the first of 61 news pickups.
Pistol Whipped	Kill 25 enemies with a pistol in Chapter 1
Give Him the Stick	Kill 25 enemies with melee attacks in Chapter 1
Why We Fight	Finish chapter 1 in the Single Player Campaign.
Let 'em Burn	Don't kill any of the enemies that are on fire in Chapter 3
Archivist	Find 30 of 61 News Pickups in the Single Player Campaign.
Fire Sale	Finish chapter 3 in the Single Player Campaign.
Freedom	Finish chapter 2 in the Single Player Campaign.
The Wall	Finish chapter 4 in the Single Player Campaign.
Welcome to Freedom	Talk at least once to each inhabitant of Oasis in Chapter 2
Safer Skies	Destroy all the SAM trucks in the level in Chapter 6
20 Points
Squad Commander	Enter an Xbox LIVE Ranked match as the Party Leader of a 4-Player Minimum Party.
Medal of Honor	Be victorious in an Xbox LIVE Ranked match as the Party Leader of a Party.
25 Points
The Wall - Guerrilla	Finish chapter 4 on the Hardest Difficulty in the Single Player Campaign.
Iron Man - Heartland	Finish chapter 5 in the Single Player Campaign without dying or rebegining a checkpoint.
Iron Man - Freedom	Finish chapter 2 in the Single Player Campaign without dying or rebegining a checkpoint.
Weapon Expert	Finish an expert challenge for any weapon in Xbox LIVE.
Iron Man - Fire Sale	Finish chapter 3 in the Single Player Campaign without dying or rebegining a checkpoint.
Freedom - Guerrilla	Finish chapter 2 on the Hardest Difficulty in the Single Player Campaign.
Iron Man - Why We Fight	Finish chapter 1 in the Single Player Campaign without dying or rebegining a checkpoint.
Iron Man - Overwatch	Finish chapter 6 in the Single Player Campaign without dying or rebegining a checkpoint.
Why We Fight - Guerrilla	Finish chapter 1 on the Hardest Difficulty in the Single Player Campaign.
Overwatch - Guerrilla	Finish chapter 6 on the Hardest Difficulty in the Single Player Campaign.
Heartland - Guerrilla	Finish chapter 5 on the Hardest Difficulty in the Single Player Campaign.
Drone Expert	Finish an expert challenge for any drone in Xbox LIVE.
Vehicle Expert	Finish an expert challenge for any vehicle in Xbox LIVE.
Iron Man - The Wall	Finish chapter 4 in the Single Player Campaign without dying or rebegining a checkpoint.
Fire Sale - Guerrilla	Finish chapter 3 on the Hardest Difficulty in the Single Player Campaign.
30 Points
3-Star Threat	Become a 3-Star threat in a Battle Commander Xbox LIVE Ranked match.
Full Boat	Enter an Xbox LIVE Ranked match in a Party with 16 players.
Historian	Find all 61 News Pickups in the Single Player Campaign.
50 Points
Over the Hill	Reach experience level 50 in Xbox LIVE.
75 Points
5-Star Threat	Become a 5-Star threat in a Battle Commander Xbox LIVE Ranked match.
100 Points
Expert Of War	Finish all challenges for weapons, drones, vehicles, and modes in Xbox LIVE.

10 Points
Fatal and Tragic	Jump off the Golden Gate Bridge in Chapter 7
Wilhelm's Nightmare	Knock 10 enemies off of the scaffolding during the helicopter fly-in in Chapter 7
David Rejected	Finish the street section without Goliath taking any damage in Chapter 4
Golden Gate	Finish chapter 7 in the Single Player Campaign.
Soft Targets	Destroy all vehicles using the UAV in Chapter 7
25 Points
Golden Gate - Guerrilla	Finish chapter 7 on the Hardest Difficulty in the Single Player Campaign.
Iron Man - Golden Gate	Finish chapter 7 in the Single Player Campaign without dying or rebegining a checkpoint.

- Deus Ex reference
In Chapter 2: Freedom, the first line the black-marketer inside the labor camp will say is 'You want to talk to El Ray? That's cool!'. This is an exact statement made by a body guard for the Rook gang leader in the abandoned Brooklyn Bridge subway station in Deus Ex.

- Red Dawn reference
During the second or third mission where you first see the Korean camp for the Americans full of trailers and RVs, there is a sign that reads 'Go Wolverines'. This is a reference to the school's team in the movie Red Dawn. The story is written by John Milius, who co-wrote Apocalypse Now and wrote/directed Red Dawn, which depicts a resistant movement against a Soviet-led invasion of the United States.