New weapon: Gusenberg Sweeper
Nothing says "I love you" quite like the warm wooden grip and cold steel barrel of a Gusenberg Sweeper machine gun. Get it from any Ammu-Nation location in GTA Online (in Story Mode, the Sweeper is automatically deposited into each character's weapon inventory with two full clips and additional ammo can be purchased at Ammu-Nation).

New vehicle: Albandy Roosevelt
Paint the town red in the classically-inspired Albany Roosevelt. This armored 1920s limousine is perfect for gangsters and their molls. To properly run amok with the new Roosevelt, get in the driver's seat and let your friends or Crewmates hang off the side, firing and taking out your rivals as you pass them by. The Roosevelt can be accessed from any garage property in Story Mode and is available in GTA Online from the legendarymotorsport.net in-game website.

New attire
Dress to the nines in a host of new double breasted suits and 1920s flapper dresses, or bare it all in sexy undergarments while going incognito with a selection of new masquerade masks. There are also new novelty t-shirts, hats and more available in stores throughout Los Santos, plus a new Flapper Bob hairstyle exclusively for the ladies.

10 new jobs
The Valentine's Day Massacre also includes 10 new Jobs scattered like the remnants of a broken heart throughout the world of GTA Online, including Deathmatches, a new Parachute Jump and new land, sea and cycling Races."Rockstar"