Grand Theft Auto Double Pack

In either Grand Theft Auto: 3 or Grand Theft Auto: Vice City get any sniper rifle and shoot at the moon and it will change size. In GTA:3 there are two moon sizes and in GTA:VC their are 7 moon sizes.

Enter these during gameplay and not the pause menu:

Restore Health - R2, R2, L1, R1, Left, Down, Right, Up, Left, Down, Right, Up
Restore Armor - R2, R2, L1, L2, Left, Down, Right, Up, Left, Down, Right, Up
Every Single Weapon - R2, R2, L1, R2, Left, Down, Right, Up, Left, Down, Right, Up
$25,000 Dollars - R2, R2, L1, L1, Left, Down, Right, Up, Left, Down, Right, Up
Destory Every Car - L2, R2, L1, R1, L2, R2, Triangle, Square, Circle, Triangle, L2, L1
Invisible Cars - L1, L1, Square, R2, Triangle, L1, Triangle
Slow Gameplay Down - Triangle, Up, Right, Down, Square, R1, R2
Speed Gameplay Up - Triangle, Up, Right, Down, Square, L1, L2
Remove Wanted Level - R2, R2, L1, R2, Up, Down, Up, Down, Up, Down
Increase Wanted Level By Two Stars - R2, R2, L1, R2, Up, Down, Up, Down, Up, Down
Normal Weather - L1, L2, R1, R2, R2, R1, L2, Triangle
Foggy Weather - L1, L2, R1, R2, R2, R1, L2, X
Cloudy Weather - L1, L2, R1, R2, R2, R1, L2, Square
Rainy Weather - L1, L2, R1, R2, R2, R1, L1, Circle
Make A Tank Fall From The Sky - Circle, Circle, Circle, Circle, Circle, Circle, R1, L2, L1, Triangle, Circle, Triangle
Make The Game Clock Faster - Circle, Circle, Circle, Square, Square, Square, Square, Square, L1, Triangle, Circle, Triangle
Change Into A Random Pedestrian - Right, Down, Left, Up, L1, L2, Up, Left, Down, Right
Pedestrians Randomly Fight Each Other - Down, Up, Left, Up, X, R1, R2, L2, L1
Pedestrians All Come To Fight You - Down, Up, Left, Up, X, R1, R2, L1, L2
Pedestrians Carry Weapons - R2, R1, Triangle, X, L2, L1, Up Down
Great Handling - R1, L1, R2, L1, Left, R1, R1, Triangle
Ability To Shoot Off Limbs/Heads - Square, L1, Circle, Down, L1, R1, Triangle, Right, L1, X

Get 1 Police Bribe - Kill 10 Criminals In A Vigilante Mission In Portland
Get 2 Police Bribes - Kill 20 Criminals In A Vigilante Mission In Portland
Get 3 Police Bribes - Kill 10 Criminals In A Vigilante Mission In Staunton Island
Get 4 Police Bribes - Kill 20 Criminals In A Vigilante Mission In Staunton island
Get 5 Police Bribes - Kill 10 Criminals In A Vigilante Mission In Shoreside Vale
Get 6 Police Bribes - Kill 20 Criminals In A Vigilante Mission In Shoreside Vale
Health Refill At Every Hideout - Rescue 35 People In The Ambulance Missions
Adrenaline Pill At Every Hideout - Rescue 70 People In The Ambulance Missions
Flamethrower At Every Hideout - Complete Firetruck Mission Level 12
Borgnine Taxicab - Complete 100 Taxicab Mission (doesn't have to be in one run)
Infinite Run - Complete Ambulance Mission Level 12

Enter these during gameplay and not on the pause menu:

Restore Armor - R1, R2, L1, X, Left, Down, Right, Up, Left, Down, Right, Up
Restore Health - R1, R2, L1, Circle, Left, Down, Right, Up, Left, Down, Right, Up
Light Weapon Variation - R1, R2, L1, R2, Left, Down, Right, Up, Left, Down, Right, Up
Medium Weapon Variation - R1, R2, L1, R2, Left, Down, Right, Up, Left, Down, Down, Left
Heavy Weapon Variation - R1, R2, L1, R2, Left, Down, Right, Up, Left, Down, Down, Down
Remove Wanted Level - R1, R1, Circle, R2, Up, Down, Up, Down, Up, Down
Increase Wanted Level By Two Stars - R1, R1, Circle, R2, Left, Right, Left, Right, Left, Right
Reduce Health By Fifty Points - Right, L2, Down, R1, Left, Left, R1, L1, L2, L1
Make Certain Female Pedestrians Follow You - Circle, X, L1, L1, R2, X, X, Circle, Triangle
Change Into A Random Pedestrian - Right, Right, Left, Up, L1, L2, Left, Up, Down, Right
Become Ricardo Diaz - L1, L2, R1, R2, Down, L1, R2, L2
Become Lance Vance - Circle, L2, Left, X, R1, L1, X, L1
Become Candy Sxxx - Circle, R2, Down, R1, Left, Right, R1, L1, X, L2
Become Ken Rosenberg - Right, L1, Up, L2, L1, Right, R1, L1, X, R1
Become Hilary King - R1, Circle, R2, L1, Right, R1, L1, X, R2
Become One Of The Love Fist Members - Down, L1, Down, L2, Left, X, R1, L1, X, X
Become One Of The Other Love Fist Members - R1, L2, R2, L1, Right, R2, Left, X, Square, L1
Become Phil Cassidy - Right, R1, Up, R2, L1, Right, R1, L1, Right, Circle
Become Sonny Forelli - Circle, L1, Circle, L2, Left, X, R1, L1, X, X
Becomes Mercedes Cortez - R2, L1, Up, L1, Right, R1, Right, Up, Circle, Triangle
Weather Is Rainy - R2, X, L1, L1, L2, L2, L2, Circle
Weather Is Foggy/Misty - R2, X, L1, L1, L2, L2, L2, X
Weather Is Extremely Cloudy - R2, X, L1, L1, L2, L2, L2, Square
Weather Is Cloudy - R2, X, L1, L1, L2, L2, L2, Triangle
Weather Is Normal - R2, X, L1, L1, L2, L2, L2, Down
Create A Rhino Tank - Circle, Circle, L1, Circle, Circle, Circle, L1, L2, R1, Triangle, Circle, Triangle
Create A Bloodring Banger Variation #1 - Down, R1, Circle, L2, L2, X, R1, L1, Left, Left
Create A Bloodring Banger Variation #2 - Up, Right, Right, L1, Right, Up, Square, L2
Create A Hotring Racer Variation #1 - R1, Circle, R2, Right, L1, L2, X, X, Square, R1
Create A Hotring Racer Variation #2 - R2, L1, Circle, Right, L1, R1, Right, Up, Circle, R2
Create A Romero's Hearse - Down, R2, Down, R1, L2, Left, R1, L1, Left, Right
Create A Love Fist Limo - R2, Up, L2, Left, Left, R1, L1, Circle, Right
Create A Trashmaster - Circle, R1, Circle, R1, Left, Left, R1, L1, Circle, Right
Create A Sabre Turbo - Right, L2, Down, L2, L2, X, R1, L1, Circle, Left
Create A Caddie Golf Cart - Circle, L1, Up, R1, L2, X, R1, L1, Circle, X
Destroy All Cars - R2, L2, R1, L1, L2, R2, Square, Triangle, Circle, Triangle, L2, L1
Erratic Drivers - R2, Circle, R1, L2, Left, R1, L1, R2, L2
Cars Are Pink/Purple - Circle, L1, Down, L2, Left, X, R1, L1, Right, Circle
Cars Are Pitch Black - Circle, L2, Up, R1, Left, X, R1, L1, Left, Circle
Slow Gameplay - Down Triangle, Up, Right, Down, Square, R2, R1
Speed Gameplay - Up Triangle, Up, Right, Down, L2, L1, Square
Invisible Cars - Triangle, L1, Triangle, R2, Square, L1, L1
Cars Hover - Right, R2, Circle, R1, L2, Down, L1, R1
Boats Hover - R2, Circle, Up, L1, Right, R1, Right, Up, Square, Triangle
Great Handling - Triangle, R1, R1, Left, R1, L1, R2, L1
Speed Up The Game Clock - Circle, Circle, L1, Square, L1, Square, Square, Square, L1, Triangle, Circle, Triangle
Slow Down The Game Clock - Triangle, Up, Right, Down, Square, R2, R1
Pedestrians Randomly Fight Each Other - Down, Left, Up, Left, X, R2, R1, L2, L1
Pedestrians All Fight You - Down, Up, Up, Up, X, R2, R1, L2, L2
Any Four Wheeled Vehicles Drive On Water - Right, R2, Circle, R1, L2, Square, R1, R2
Some Cars Get Bigger Wheels, Some Cars Accelerate Extremely Fast, Some Cars Can Ram Like A Truck, And Some Cars Get Nothing At All - R1, X, Triangle, Right, R2, Square, Up, Down, Square

Fulfill the requirements to receive the unlockable.

Effect - Code

Infinite Run - Finish Ambulance Mission Level 12
+50 Points To Overall Health - Finish Pizza Boy Mission Level 10
+50 Points To Overall Armor - Finish Vigilante Mission Level 12
Immune To Fire - Finish Firetruck Mission Level 12
Hydraulics On Every Taxi/Cab - Finish 100 Taxi/Cab Drop-Offs (does not need to be in one run)

In Vice City, there's a Scarface easter egg in the form of a bloody bathroom and a chainsaw weapon.

Go to the Pay N' Spray at Ocean beach, then go south and take the first left. On your left, you'll see a two story apartment with two sets of stairs on the second floor.

Head up the stairs to the right and you'll see a black doorway. Check out the bathroom in apartment 3c and compare it to the movie.