Marauder

The Marauder is a new Terran infantry unit in StarCraft II. It replaced the Firebat from earlier development builds.

Game Unit
It resembles the Firebat and is equipped with dual concussion-grenade launchers which slow down biological units and deal extra damage to armored units. It can use stimpacks.

The Marauder is considered an early support unit, designed to pick off early game units. It is useful for slowing down fast melee units such as the Zealot.

The Marauder is built from the Barracks and requires a Tech Lab.

Trivia
In pre-release versions of StarCraft I, the Marine was known as the "Marauder".