GURPS Powers™ is a 4th Edition supplement written by Sean Punch and Phil Masters in 2005 for GURPS. Often considered the 3rd core book after the Basic Set. Even as a Hardcover with 240 full-color pages to work with, it was an editorial challenge to fit everything in.
Beyond detailing the powers system hinted at in the Psionics chapter in GURPS Basic Set: Characters. It adds 5 new advantages: Control, Create, Illusion, Leech and Static, on top of a host of case-by-case advice build abilities with the tools available in the Basic Set. As well as new enhancements and limitations.