The Slums are a location found in F.E.A.R. 3.
The Slums area makes up Interval 02 of the game, just after the Point Man and Paxton Fettel escape from the prison. Where the slums area is located is unknown, however, it is hinted that it may be somewhere in a South American country.
After escaping Armacham guards in the prison, the Point Man and Fettel fall into a sewer and follow it until they reach a small village. Aware of their escape, Armacham Technology Corporation sends several forces into the slums to look for the brothers including light armor support, which the two kill with ease. When their regular soldiers can't stop the Point Man and Fettel, ATC sends in a Phase Caster, which acts as a final boss at the end of the level. With ATC's soldiers defeated, the brothers are able to hijack one of ATC's helicopters, which takes them to Fairport, the city of their birth, and where their mother, Alma Wade, is in labor with her third child.