Rockstar recently released the newest content update for GTA Online which contained the Halloween Surprise DLC. The update introduced two new spooky vehicles, a new weapon in the form of the ominous flashlight, and several new masks and face paints with a Halloween theme to them.
Rockstar also kicked off a weekend event on Friday, which is still on today, dedicated entirely to Halloween. The event includes exclusive shirts you can unlock simply by logging in, a Halloween official playlist, giveaways and livestreams. Compared to a significantly less elaborate and expansive weekend event last year, Rockstar has really outdone itself for this year's Halloween celebration.
The GTA Online DLC's major gameplay addition, however, is the new Adversary Mode, Slasher. Slasher pits seven "Hunted", armed with nothing but a rather hard-hitting flashlight, against the titular shotgun wielding "Slasher". As you've probably guessed, the goal of Slasher, for the Slasher, is to kill everyone else, and the goal of everyone else is to not die for three minutes. After the three minutes is up they all receive shotguns as well, and can then take revenge on the Slasher for their fallen comrades.
