Beat Krew in weapons lab was a mission in Jak II. Jak met Krew at the weapons factory, who explained he was working with Baron Praxis on wiping out the Metal Heads by cracking open the Precursor Stone using his newly built piercer bomb. Jak then fought Krew, using his newly acquired gun upgrade. The PlayStation 3 and Vita versions of this mission are related to a trophy named "Who Knew Krew Blew?". Completing this mission will reward you with a silver trophy.