Riot soldier

The riot soldier is a monster introduced in The Ancient Gods, Part Two. It is a variant of the shield soldier that carries a chaingun, and can be identified by its red armor and golden shield.

Tactical analysis
The riot soldier's shield is indestructible, making it impervious to frontal damage. The easiest way to kill a riot soldier is to launch a frag grenade or fire a rocket behind it.

Lore
Like other soldiers, the riot soldiers are humans who have been claimed by darkness. They march under the banner of the Dark Lord, carrying blessed shields raided from Urdak.

Trivia

 * Although the riot soldiers' shields are described as coming from Urdak, they still have a UAC logo on them.