Set entirely on the planet Helghan, the home world of the Helghast who invaded an Interplanetary Strategic Alliance (ISA) colony. Two years after the Helghast assault on Vekta, the ISA launched an assault on the enemy’s home world of Helghan. The ISA goal is to capture the Helghast leader, Emperor Scolar Visari, and bring the Helghast war machine to a halt.