Grand Theft Auto: Vice City

In order to snipe a seagull you must first acquire a sniper rifle. There are two types of Sniper Rifles in the game, the Sniper Rifle and the PSG-1/.308. The Sniper Rifle can be bought from Ammu-Nation after the "Phnom Penh '86" story mission for $1,500 and can also be found in the maze on the western side of Diaz's mansion on Starfish Island. The PSG-1/.308 can be bought from Ammu-Nation after the "Shakedown" mission for $6000. You can also use the weapon cheats to acquire these weapons. See here: LINK for a list of cheats that can be used in the game.

Once you have acquired one of the two Sniper Rifles and have plenty of ammo, head to the beach on the eastern side of Vice City. You will notice birds flying through the sky for short periods of times. Seagulls only appear in the sky whilst flying and cannot be found on the ground. You must equip your sniper rifle and aim by holding and then zoom in and out by pressing either or . It’s best to wait for a seagull to fly through your crosshair as opposed to try and track one with the crosshair as the aiming controls are not very easy to use. When a seagull is in your sights, shoot it with to kill it and unlock the trophy.

The following video shows the location of the beach and how to kill a seagull to unlock the trophy: