Peter Barrett is a founding partner at Playground Global who employs dozens of scientists and engineers to experimentally retire deep technical risk in-house—building prototypes like jet engines that run on ammonia to validate investment theses—rather than making probabilistic bets on unproven technologies. He holds over 100 patents from building core products like the first QuickTime video codec and WebTV browser, and has achieved an unusually high deep-tech hit rate with over 20% of Playground's portfolio reaching unicorn status, including companies like PsiQuantum, Relativity Space, and Skydio. Peter Barrett is a founding partner at Playground Global who employs dozens of scientists and engineers to experimentally retire deep technical risk in-house—building prototypes like jet engines that run on ammonia to validate investment theses—rather than making probabilistic bets on unproven technologies. He holds over 100 patents from building core products like the first QuickTime video codec and WebTV browser, and has achieved an unusually high deep-tech hit rate with over 20% of Playground's portfolio reaching unicorn status, including companies like PsiQuantum, Relativity Space, and Skydio.