The Resistance originated in Philadelphia and began their retaliation against the North Korean occupation in 2027. After much heavy fighting, the Resistance were driven underground while leaving much of the city in ruins.
In 2029, Benjamin Walker, a prominent figure of the Resistance, was captured by the KPA. The Resistance led by Jack Parrish attempted to rescue Walker while inciting the citizens of Philadelphia to rise up against their occupiers with the aid of the Resistance's newest member, Ethan Brady. However, the Resistance failed in their objective as Walker was brainwashed and relocated to an unspecified location, and one of their members, James Crawford, betrayed them and allowing the KPA to coordinate a massive strike on Resistance strongholds throughout the city.
Despite of their losses, the Resistance managed to retaliate by infiltrating Independence Hall and (unintentionally) killing American collaborator Mayor William Simpson on live television. In desperation, Parrish gave a speech urging the American people to rise up against the KPA, which succeeds in spurring the people of Philadelphia to rebel. However, this forced the KPA to releasing nerve gas upon the city via airships. The Resistance barely saved the city after disabling the KPA's Duster drones and destroying the airships with captured Surface-to-Air missile launchers.
Days after the rebellion, the Resistance struggle to maintain its hold over Philadelphia while threatened by demoralization and desertion, attributed to Benjamin Walker, who was brainwashed by the KPA and making propaganda broadcast against the Resistance. The Resistance called for the death of Walker to cease the demoralization. However, Ethan Brady went against the Resistance's mark for death and personally rescued Walker.
- Jack Parrish - Leader of the Philadelphia cell.
- Dana Moore - Cell leader.
- Benjamin Walker - Founder and head of the Voice of Freedom radio station.
- Heather Cortez - Resistance Engineer.
- Sam Burnett - Doctor.
- Sidney Cook - Quartermaster.
- Ned Sharpe - Owner of the Resistance Armory.
- Wiley Biggins
- Ethan Brady