Maelstrom round

Maelstrom rounds are a payload developed for the terran siege tank around the early stages of the Second Great War. They have an armor-piercing tip that inflicts devastating damage on the primary target, but its splash damage is identical to the standard round. Raynor's Raiders gained access to these rounds after their operation on Xil.

Co-op Missions
In Co-op Missions, Maelstrom rounds are available as an upgrade for the siege tanks of Rory Swann.