 Command & Conquer: Red Alert: Retaliation is an adaptation of two add-on packs created for the PC game Command & Conquer: Red Alert, the prequel to the original Command & Conquer game. As before, you take on the role of one of two opposing armies, commanding your troops and vehicles to take out enemy forces, while defending your base and harvesting materials to keep the old war machine running. Some missions demand more precise goals than simply overrunning your opponent, such as sneaking spies into his camps to learn shipping routes or even commanding a small platoon of soldiers, sans base and vehicles, within an enemy research facility.