- — Sgt. Marcus Fenix alerting his squadmates of nearby Shriekers
A Shrieker was a type of Hollow creature that appeared during the Locust-Human War and the Lambent Invasion. As the name suggests, they make a very harsh shrieking noise. They were small creatures that floated in mid-air, had a reddish-pink glow, and were equipped with modified Gorgon SMGs.
Destruction of Halvo BayEdit
Shriekers were encountered by Kilo Squad on the rooftops of Halvo Bay during its destruction. Armed only with Boltok Pistols and Longshots, Kilo found it difficult to deal with their attackers but eventually managed to dispose of them. Some attacked Kilo shortly after they had fired the Lightmass Missile but were slain yet again. They were later encountered inside the Courthouse in areas where the roofs had been destroyed and were quickly dealt with by Kilo Squad.
- "Shit, we've got her Shriekers here too?"
- — Jace Stratton, after finding several Shriekers inside Griffin Tower
Delta-One first met Shriekers after meeting Queen Myrrah in the Deadlands, where they emerged from behind the Tempest. Delta took them out before dealing with the rest of the Locust. After dealing with them, another swarm appeared behind a gate but were also destroyed by the Gears.
More swarms attacked Griffin Tower after Myrrah attacked it with her Tempest and finished of the remaining Stranded, except for Dizzy and Griffin, until Delta-One destroyed all of them. At Endeavour Naval Shipyard, several swarms of Shriekers attempted to stop Delta from finding fuel and a rotor to repair the CNV Adamant and from leaving the shipyard with the submarine, but they were all obliterated by the Gears.
At Azura, a swarm engaged Delta Squad at the gates of the Maelstrom compound, alongside an Armored Kantus, but they were unable to stop the Gears from accessing the compound. As the Tempest was injured at Pinnacle Tower, it released swarms of Shriekers towards Delta, though they were all slain. Shortly after, the Imulsion Countermeasure Weapon was activated and it presumably wiped these creatures out, along with every other Hollow creature.
Shriekers were bio-luminescent and had the ability to float above the ground flawlessly; it's possible that they use methane to stay afloat, explaining their flammability. Despite their size, they were surprisingly formidable opponents with their swarm tactics, considerable agility, and surprising accuracy.