"GURPS International Super Team Supplement & Adventure in Jamaica" "IST Kingston: It's not just a job, it's a vacation!" The first official third-party supplement for GURPS. For use with GURPS Supers and GURPS International Super Teams sourcebooks. IST Kingston is a super-fortress disguised as a resort complex and id the U.N.'s watchdog of the volatile Caribbean. Published by Modern Myth Publishing. Distributed by Steve Jackson Games.