Achievements...
	Cheat Mode...
	Fly longer with parachute...
	Gang Wars Unlockables...
	Golden Buzzard...
	Golden Super Drop Diamond...
	Grinding for Money, with Limit...
	Niko and Johnny references...
	NOOSE APC at construction site...
	Parachute...
	Remove ammo cap...
	Yellow Super Drop Diamond outs...

Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Adrenaline Junkie ( 25 points )	Freefall for the longest possible time.
Bear Fight ( 15 points )	Win the L.C. Cage Fighters championship.
Catch the Bus ( 15 points )	Dance perfectly in both Tony's nightclubs.
Diamonds Forever ( 5 points )	Complete the Trinity.
Four Play ( 10 points )	Hit a flag with a golf ball four times.
Gold Star ( 80 points )	Score 100% in all missions.
Gone Down ( 5 points )	Complete all base jumps.
Maestro ( 30 points )	Finish the Ballad.
Past the Velvet Rope ( 45 points )	Score 80% or above in all missions.
Snow Queen ( 20 points )	Complete 25 drug wars.

Press Up to display the cellphone during game play. Press Up again to access the keypad. In addition to the codes available in the parent game, you can enter one of the following codes to activate the corresponding cheat function in the expansion. Note: Once a code has been entered correctly, a new "Cheats" menu option will be available on your phone, below "Options", where you can access the cheats without having to enter the phone number again. Do not save the game after enabling a code to avoid unforeseen problems. Enabling some codes may prevent achievements from becoming unlocked.

Code	Effect
Dial 3625550100 into the cellphone.	Armor
Dial 4685550100 into the cellphone. Note: This phone number translates to "HOT-555-0100". Repeat this code to cycle through four different settings.	Change weather and brightness
Dial 4865552526 into the cellphone.	Explosive sniper rifle shots
Dial 4825550100 into the cellphone.	Health, armor and ammunition
Dial 6255550200 into the cellphone.	Spawn Akuma bike
Dial 3595550100 into the cellphone. Note: This phone number translates to "FLY-555-0100".	Spawn Annihilator police helicopter
Dial 2725558265 into the cellphone.	Spawn APC
Dial 2275559666 into the cellphone.	Spawn Bullet GT
Dial 3595552899 into the cellphone.	Spawn Buzzard helicopter
Dial 2275550142 into the cellphone. Note: This phone number translates to "CAR-555-0142".	Spawn Cognoscenti
Dial 2275550175 into the cellphone. Note: This phone number translates to "CAR-555-0175".	Spawn Comet
Dial 2275550100 into the cellphone. Note: This phone number translates to "CAR-555-0100".	Spawn FIB Buffalo
Dial 9385550150 into the cellphone.	Spawn Floater boat
Dial 9385550100 into the cellphone. Note: This phone number translates to "WET-555-0100".	Spawn Jetmax
Dial 6255550100 into the cellphone. Note: This phone number translates to "MBK-555-0100".	Spawn NRG-900
Dial 3595557272 into the cellphone.	Spawn parachute
Dial 6255550150 into the cellphone. Note: This phone number translates to "MBK-555-0150".	Spawn Sanchez
Dial 2275550168 into the cellphone. Note: This phone number translates to "CAR-555-0168".	Spawn Super GT
Dial 2275550147 into the cellphone. Note: This phone number translates to "CAR-555-0147".	Spawn Turismo
Dial 6255553273 into the cellphone.	Spawn Vader bike
Dial 2765552666 into the cellphone.	Super punch
Dial 4865550150 into the cellphone.	Weapons tier 1
Dial 4865550100 into the cellphone.	Weapons tier 2
Dial 4865550100 into the cellphone. This code will unlock the knife, .44 pistol, explosive shotgun, assault SMG, advanced MG, advanced sniper, grenade launcher, and sticky bombs.	Weapons tier 2 plus
Dial 4855550100 into the cellphone.	Weapons tier 3

Jump off a tall building, deploy the parachute, then click and hold the Left Analog-stick while rapidly tapping LT + RT.

Unlockable	How to unlock
.44 in Safehouse	Complete 10 gang wars.
Advanced MG in Safehouse	Complete 20 gang wars.
Explosive Shotgun in Safehouse	COmplete 30 gang wars.
Gold SMG in safehouse	Complete 50 gang wars.
Golden Buzzard	Beat the game to unlock a Golden uzzard on a heliport over the Booth Tunnel.
NOOSE APC at construction site	Kill all 50 seagulls.
Parachute in safehouse	Complete 15 base jumps.
Remove ammo cap	Achieve 100% completion.
Sticky Bombs in Safehouse	Complete 40 gang wars.

Complete the game to unlock a Golden Buzzard at Yusef's heliport near the Booth Tunnel.

After progressing through Yusuf's missions, you will eventually receive his golden Super Drop Diamond as a reward. It will always be available when you need it, and upon entering and exiting the vehicle you will have the Golden SMG in your inventory.

If you can find a way to Happiness Island you can do a lot of grinding on the people because there aren't enough cops over there to stop you. However, helicopters will show, but can easily be avoided.

At the start of the game, as Luis is shown walking down the streets of Liberty City, you will see Niko in a vehicle after the heist. You will also see Johnny ride off on his motorcycle.

Kill all 50 seagulls.

Complete all base jumps to to unlock a parachute at your apartment.

Achieve 100% completion.

Beat the game.