Pyrrhus, the capital city of Helghan, with the goal of deposing and arresting Emperor Scolar Visari on charges of war crimes. Among the ISA units taking part in the attack is Alpha Squad, led by Jan's old comrade Ricardo "Rico" Velasquez. Sergeant Tomas "Sev" Sevchenko, a veteran of the ISA "Legion" battalion, is assigned to serve as his second-in-command. Tasked with securing Pyrrhus against the fierce resistance of the Helghan Second Army, the team quickly discovers that the Helghast are well prepared for an invasion. Using Helghan's harsh environment to their advantage, they have developed new weapons and equipment, none of which the ISA has ever seen before. Furthermore, the planet's fog-like atmosphere, gritty deserts, and constant storms pose almost as much of a threat to the invaders as the enemy themselves. Story Led by Jan's flagship, the New Sun, the ISA bombard Pyrrhus as cover for a massive ground assault on the city. Despite stiff resistance from well-armed Helghast divisions, they steadily advance towards the Imperial Palace, ultimately capturing both Visari Square and the Helghan Military Academy. Just as the main convoy is set to attack the palace, Colonel Mael Radec, commander of the Second Army, activates a network of arc towers hidden beneath Pyrrhus, killing hundreds of ISA soldiers and breaking their momentum. Dante Garza, a member of Alpha Squad and close friend of Tomas's, retrieves a piece of a destroyed tower and sends it to ISA researcher Evelyn Batton, who learns that the towers are powered by Petrusite, a mineral capable of generating and channeling electricity. She also identifies an old mining outpost on the outskirts of Pyrrhus where the Helghast have been secretly extracting it for military use. While working to restore the outpost's communication antenna, Tomas and Rico are separated from the rest of Alpha Squad, allowing Radec's men to capture them. The two fight their way through the refinery where the captives were taken, stumbling upon an interrogation overseen by Radec himself. Oddly enough, he demands that Evelyn give him the launch codes to a set of stolen nuclear warheads in Helghast custody. Rico loses his temper and surprises Radec, saving the captives but leaving Garza mortally wounded when one of Radec's men Rico kills discharges his weapon and Garza is shot in the process. Blaming him for his friend's death, Tomas and the squad return to the New Sun. Before Garza can be