Jak 3

Story related and cannot be missed.
You will be tasked with keeping the city safe by destroying the assaulters. Head to the garage and choose which car you want to defend the city with, then head out the gates. There will be many smaller cars driving around – ignore them. Simply focus on destroying the bigger cars. There will be a countdown in the top right that allows you to track your progress. The city’s health will be shown in the top left – don’t worry about it too much; I still had around 80% life left when I cleared it. After you have defeated all 13 vehicles, you will receive this trophy.