GOOOAAAAALLLL!
From Halopedia, the Halo wiki
GOOOAAAAALLLL!
GOOOAAAAALLLL! is an achievement in Halo: The Master Chief Collection. It is unlocked by shooting the Soccer Ball located on the level Metropolis.
Trivia
The easiest way to access the soccer ball is to fly to it using a Banshee. As such, players should plan to unlock this achievement immediately after finding the Scarab Gun and unlocking the Scarab Lord achievement, utilizing the Banshee acquired for the latter achievement to unlock the former.
