ARGOS is an enormous building-sized multi-legged rover armed with missiles, extremely accurate long-range laser weapons, and an advanced array of sophisticated sensors used for communicating with ODYSSEUS and tracking and finding prisoners via their Lil' Pip 3000s.
In the heist pulled by Victor Presper's men, ARGOS was damaged on its release. This weakened it slightly by damaging its movement servos and made it impossible for ODYSSEUS to command. ARGOS ceaselessly attempts to retrieve the prisoners no matter what ODYSSEUS tells them to do. This is counterproductive because ODYSSEUS needs ARGOS to seal a large breach in the prison through which the player character can repeatedly walk right out of. Further, Cell Block 13 is completely blasted open, so there's absolutely no barrier for the player character if they get re-captured. At least the other cell blocks can hold the prisoners that the Prisoner/ARGOS recover.