The Halloween event is in full swing in Los Santos and Blaine County, and the residents are driving around the city looking for mysterious pumpkins, also known as Jack-O'-Lanterns. Rockstar has introduced new Jack-O'-Lanterns scattered all over the city for players to find as part of the new Halloween event.
There are 200 pumpkins that players can find to either get a treat (reward) or a trick. When a player collects a single Jack-O'-Lantern, they either get a random trick or a treat. The treats include maximum health & armor, snacks, up to $5,000 cash, and 1,000 RP.
The tricks include getting stoned, explosion, energy pulse, getting shocked, and a random Peyote hallucination.
You must collect at least ten pumpkins to unlock a Halloween Pumpkin Mask with a unique action that plays mask audio and earn $50,000.

If you collect all 200, you unlock a special Pumpkin Tee as a reward with an additional $50,000.