Beat turret challenge was a mission in Jak 3. According to Kleiver, he used to be the "tall poppy" on the Spargus gun turret. He then challenged Jak to go and try to beat his score.
Walkthrough[]
See also: Spargus turret game
Use the turret to shoot the targets that pop out of the sea. Reds are worth the least, while greens are worth the most with blues in between. Shoot them as soon as possible to earn more points, while missing ten total will cause you to lose. You will need 7000 points to complete this mission. Do note you should shoot as many times as possible, since the multiplier in this minigame does not yet apply for this mission.