In "Suffer With Me" McKnight states that he will provide cover from building 12, yet when he is in position, he radios that he is on building 10.
In the intro clip, Woods says that the pod ejected from the recon satellite was picked up by a C-130, while the video depicts what appears to be a C-17 with propellers.
Mr. Mason destroys a Soviet tank by jumping upon it and throwing a mortar bomb inside. Since mortar bombs are nearly always impact-fuzed, doing so would be tantamount to suicide.
Stinger missiles are seen being used against tanks and other armoured vehicles. Stinger missiles have a relatively small warhead and therefore cannot be effectively deployed against armoured targets.
Several of the weapon reloading animations are wrong, such as the one for the MP5.
It is possible for vehicles to explode and kill NPCs or the Player. Gasoline is not explosive and thus vehicles don't explode.
Any time the Player picks up a weapon it is cocked. If it is already loaded, cocking it would not be necessary.
Admiral Briggs tells Section to keep an eye on the patrolling drone. There are several patrolling drones, not just one.
In the level in Pakistan, the CLAW units somehow make it to their positions in seconds, even though the positions are up to a few stories up and more than a hundred feet away.
During the mission "Suffer With Me", which takes place in the 1989 invasion of Panama, US soldiers are seen with M16A1 rifles. The M16A1, which was the standard assault rifle used in Vietnam, had been phased out of service by the late 1980s. During the 1989 Panama invasion, US troops were equipped with the upgraded M16A2.
During the first flashback, when Woods is describing the film canister falling from the satellite, he states it was picked up by a C-130 Hercules aircraft. The aircraft on screen, however; is a C-17 Globemaster which wasn't introduced into service until 1993. The aircraft's real-life jet engines have been replaced by turboprop engines.
Admiral Briggs calls the 'S.D.C.' the 'S.C.C.'
David Mason tells his father: "Go back to the army, like you did before mom died...". But a few minutes later, when Hudson arrives, David says to Alex: "Dad, you said you'd never go back to the army."