Nyx

Nyx was an experimental biological weapon stored in Raccoon City.

Background
In late 1998, at the height of the t-Virus outbreak in Raccoon City, Nyx was stolen by Umbrella Security Service commander Rodriguez, likely at the request of Linda. An Umbrella Biohazard Countermeasure Service team was dispatched to track it down, led by Tommy Neilson and Arnold. It was released following a fall onto the highway after the chains connecting her capsule to Rodriguez's helicopter snapped after a sudden evasive action. It soon absorbed a UBCS team stationed on the highway, and later the Tyrant (Tyrant R).

Trivia

 * In Greek mythology, Nyx was the goddess of night, and the mother of Hypnos, Nemesis and Thanatos.
 * The Nyx can be defeated by using only the Combat Knife. It's recommended to use Cindy Lennox for this tactic due to her ability to dodge every attack.
 * Early Nyx artwork that can be "purchased" on the Gallery will show the Nyx killing Jim, having already consumed Cindy, David, and Alyssa.
 * This boss will absorb any unlucky survivor to get in its way, killing him/her from the high amounts of t-Virus he has inside of It.
 * During its boss fight, the Tyrant it consumed is seen to twitch as it is trying to struggle to free itself from the Nyx.
 * Nyx slightly resembles Scagdead from Resident Evil: Revelations.