From publisher blurb:
Alien teenage drama. There is no escaping it. Even in the Guardian Universe.
We call them: Twight.
A meteor falls to Earth. Dozens of teens are infected. The drama begins!
This G-Core/Guardian Universe: Revival product comes with stats for the Twight variables. Meet the Hemo-Virals, who feed on blood and turn to diamond dust when they die. The Lupine-Virals, who live by Native American code. The Psycho-Virals, everything mental wrapped up into a teenage frame.