Speed Enhancement (active)
Move faster, jump higher. Leap over tall buildings in a single bound. Also increases
distance you can fall without taking damage.
Move Silent (passive)
Your movements are quieter. Increases distance you can fall before taking damage as well.
Health Leech Drone (active)
Breaks down the tissue of dead creatures or NPCs and uses it to restore your health. The first upgrade
allows you to use ambient creatures (rats, cats, et cetera) as well as dead bodies,
and the second makes unconscious NPCs available as a "resource."