GTA San Andreas Local Liquor Store (First Base) Walkthrough

Chase the liquor-store robbers on a quad and collect their three briefcases. Catalina shoots while CJ keeps the pursuit on course.

Mission walkthrough

Choose the Blueberry robbery

Meet Catalina at her hideout when required and take her to the liquor store in Blueberry. The introductory Catalina scene depends on how many robberies you have already completed.
Follow the quads

Get onto the quad with Catalina and chase the escaping robbers. Match their route through the countryside, braking before sharp changes in direction so the quad stays upright.
Let Catalina line up her shots

Keep close enough and on a useful angle for her to fire. Avoid repeatedly hitting the target quads, as a crash can throw CJ off and create a larger gap.
Collect all three cases

Pick up the briefcases dropped by the defeated robbers. If collecting one immediately would lose the remaining targets, remember its radar position and return after the chase. Once all required cases are collected, take Catalina back to the hideout.

Defeating the robbers is only part of the job. Check the remaining case markers before driving home.