You as a mercenary goes to the abandoned city for a mission from G&K to catch AR team from Sangvis to safe them from brainwash, and now AR team is on mission to the city

SOPMOD II: I'm bored!

ST AR-15: shut up, and start looking around

RO635: you don't have to be rude, AR-15

M4A1: girls focus!

M16A1: you heard her, girls!