Pause the game, then access the cell phone. Select "Dial", then enter one of the following numbers, including the # symbol, and choose "Call". If you entered the code correctly, a message will appear. Then, go to "Cheats", and select the now unlocked option. Note: Achievements are disabled when cheats other than the "Retailer Promotion Vehicles" codes are activated.
| Result | Phone number |
| Player Ability | |
| Full Health | #1 |
| Car Mass (increased mass for harder collisions) | #2 |
| Milk Bones (increased melee attack damage) | #3 |
| Add Police Notoriety (+1 star to police wanted meter) | #4 |
| Player Pratfalls (press LB or RB to fall) | #5 |
| Infinite Sprint | #6 |
| Unlimited Clip (never reload, except for RPGs) | #9 |
| Infinite Ammo | #11 |
| Heaven Bound (killed bodies float upward) | #12 |
| Add Gang Notoriety (+1 gang attack level) | #35 |
| Never Die | #36 |
| No Cop Notoriety | #50 |
| No Gang Notoriety | #51 |
| I Am Giant (become very tall) | #200 |
| Itty Bitty (become very short) | #201 |
| Give Cash (gain $1,000) | #2274666399 |
| Vehicles | |
| Repair Car (fixes car, boat, and helicopter damage) | #1056 |
| Ambulance | #1040 |
| Anchor | #1041 |
| Atlasbreaker | #1042 |
| Attrazione | #1043 |
| Backdraft | #1044 |
| Backhoe | #1045 |
| Bag Boy | #1046 |
| Baron | #1047 |
| Bear | #1048 |
| Bootlegger | #1049 |
| Bulldog | #1050 |
| Bulldozer | #1051 |
| Compton | #1052 |
| Eiswolf | #1053 |
| FBI | #1054 |
| Five0 | #1055 |
| Hollywood | #1057 |
| Justice | #1058 |
| Kent | #1059 |
| Mag | #1060 |
| Mixmaster | #1061 |
| Mongoose | #1062 |
| Oring | #1063 |
| Phoenix | #1064 |
| Quasar | #1065 |
| Quota | #1066 |
| Rampage | #1067 |
| Raycaster | #1068 |
| Reaper | #1069 |
| Septic Avenger | #1070 |
| Shaft | #1071 |
| Stilwater Municipal | #1072 |
| Superiore | #1073 |
| Taxi | #1074 |
| The Job | #1075 |
| Titan | #1076 |
| Toad | #1077 |
| Varsity | #1078 |
| Venom Classic | #1079 |
| Vortex | #1080 |
| Zenith | #1081 |
| Horizon (commerical helicopter) | #711 |
| Snipes57 (executive private jet) | #712 |
| Tornado (police helicopter with minigun and anti-tank missiles; can lock onto other vehicles or be manually aimed) | #713 |
| Wolverine (P-51 Mustang-style airplane with machine gun) | #714 |
| Kaneda (custom street racing motorcycle) | #801 |
| Kenshin (street racing motorcycle) | #802 |
| Melbourne (Harley-style motorcycle) | #803 |
| Sabretooth (custom Harley-style motorcycle) | #804 |
| Sandstorm (dirtbike) | #805 |
| Widowmaker (moped) | #806 |
| Hurricane (speedboat) | #825 |
| Miami | #826 |
| Python | #827 |
| Shark (personal watercraft) | #828 |
| Skipper (yacht) | #829 |
| Retailer Promotion Vehicles | |
| Gyro Daddy helicopter (two person mini-helicopter) | #4976 |
| Destroy UFO (two person flying saucer) | #728237 |
| Peewee mini-bike (very small mini-bike) | #7266837 |
| Weapons | |
| 12 Gauge | #920 |
| 44 Shepherd | #921 |
| AR200 (SAW-type machine gun) | #922 |
| AR50 (X8-type assault rifle) | #923 |
| AR50 Launcher (X8-type assualt rifle with grenade launcher) | #924 |
| AS14 (fully automatic shotgun) | #925 |
| Baseball Bat | #926 |
| Chainsaw | #927 |
| Fire Extinguisher | #928 |
| Flamethrower | #929 |
| Flashbang | #930 |
| GAL43 (Uzi-like sub-machine gun) | #931 |
| GDHC | #932 |
| Grenade | #933 |
| Holt 55 (fully automatic pistol) | #934 |
| K6 Krukov | #935 |
| Knife | #936 |
| Machete | #937 |
| McManus2010 | #938 |
| Minigun | #939 |
| Molotov | #940 |
| Nightstick | #941 |
| NR4 | #942 |
| Pepper Spray | #943 |
| Pimp Cane (shotgun) | #944 |
| Pipe Bomb | #945 |
| RPG | #946 |
| RPG Annihilator (manual or lock-on guided RPG) | #947 |
| Samurai Sword | #948 |
| Satchel | #949 |
| Shock Paddles (bring dead people back to life) | #950 |
| SKR-9 | #951 |
| Sledgehammer | #952 |
| Stungun (semi-automatic Taser-style weapon; can kill if used repeatedly) | #953 |
| T3K Urban | #954 |
| Tire Iron | #955 |
| Tombstone | #956 |
| Vice 9 | #957 |
| XS-2 (fully automatic shotgun) | #958 |
| Pimp Slap (big foam middle finger) | #969 |
| Weather | |
| Wrath of God (thunderstorm with random lightning strikes) | #666 |
| Overcast | #78665 |
| Heavy Rain | #78666 |
| Light Rain | #78668 |
| Clear Skies | #78669 |
| Normal Weather | #78670 |
| World | |
| Super Explosions | #7 |
| Super Saints (almost invincibile Homies and Saints with better weapons) | #8 |
| Drunk Pedestrians | #15 |
| Evil Cars (drivers try to run you down) | #16 |
| Low Gravity (cannot be used with helicopters; use in Insurance Fraud mode to glide) | #18 |
| Pedestrian War (pedestrians and drivers fight each other) | #19 |
| Raining Pedestrians (people spawn and fall from sky but die on the ground) | #20 |
| Everybody Must Get Shrunk (everyone is very short) | #202 |
| Time Set Noon (hour set to 12 p.m. with minutes unchanged) | #1200 |
| Time Set Midnight (hour set to 12 a.m. with minutes unchanged) | #2400 |
Pause the game, then access the cell phone. Select "Dial", then enter one of the following numbers, and choose "Call" to call the corresponding service:
| Service | Phone number |
| Airport | 5553597 |
| Big Willy's Cab | 8198415 |
| Bling Bling | 5554233 |
| Brown Baggers | 5553765 |
| Cocks | 5552626 |
| Company of Gyros | 5554976 |
| Cycles | 5552453 |
| EagleLine Yellow | 0180174 |
| Emergency | 911 |
| Eye for an Eye (Zombie Carlos) | 5555966 |
| Foreign Power | 5552046 |
| Forgive and Forget | 5554448 |
| Freckle Bitch's | 5556328 |
| Friendly Fire | 5554867 |
| Fire Department | 5553473 |
| Giftshop | 5557577 |
| HazMat | 5556677 |
| Image as Designed | 5558459 |
| Impression | 5553248 |
| Leather and Lace | 5552662 |
| Legal Lee's | 5559467 |
| On The Rag | 5555926 |
| On Thin Ice | 5552564 |
| Police | 5557973 |
| Pimps 'R Us | 5557467 |
| Rim Jobs | 5553493 |
| Rusty's Needle | 5558287 |
| Ship It | 5557447 |
| Spelunkers | 5552283 |
| Suicide Hotline | 4876837 |
| Tee'N'Ay | 5559866 |
| TNA Taxis | 4558008 |
| Ultor Security | 411 |
Successfully complete enough activities to raise your respect over level 99.
Successfully complete the indicated task to unlock the corresponding reward:
Abilities
Customization Items
Fighting Styles
Homies
Store Discounts
Vehicles
Note: The vehicles will be delivered to their corresponding garages when they are unlocked. You cannot modify any special or pre-customized vehicles. There is also a storage limit for garages that may prevent unlocked vehicles from appearing there.
Weapons
Note: The weapons will appear in your weapons cache. To get infinite ammunition, pick up, unlock, or buy a weapon once. The weapon must be in the cache to get unlimited ammunition. Toggle to it when entering the cache.
Fly far off the west coast of the prison to find five secret islands. Their names are "Bone", "Lookout", "Ruins", "Ship Wreck", and "Super Secret".
Follow the arrows that start on Ruins Island. Ruins Island is close to Super Secret Island, with the Volution Easter Egg on it. Ruins Island has an arrow that points to Lookout Island, then to a small unnamed island, then to another small island with an "X" on it. Get on it, and you will be teleported to a ring of arrows pointing to a floating Easter Bunny.
Use a Bear (the Police APC) to easily complete Snatch activities. It is virtually impossible to stop once moving because it is nearly invulnerable. It can drive over smaller cars and pickups, the chaingun has infinite ammunition. It holds three passengers.
Use the flaming zombies as a weapon. When they come after you, let them follow you. Run into big crowds of zombies so the flaming zombies set the other zombies on fire, which will then count as kills for you. Also, use headshots for the small zombies.
Stand on top of a vehicle and press Y. You will instantly be in the car.
When you take a human shield, switch to your Taser and press LT. This will save some ammunition.
To kill Akuji in the teahouse, use LT to counter his attacks. It does damage and knocks him down. When he is down, stab him twice quickly before he gets up. Repeat this until he has been killed.
To defeat Maero the first time on top of his hideout, hit him once with an RPG. When scoring a direct hit, he will go on one knee and stay down. You can then shoot him until he is defeated. If he gets up, just shoot him again. To finish off Maero in the arena, use some of the rockets to blow up all the trucks except for his. Use extra rifle ammunition to shoot his Monster Truck.
To kill Mr. Sunshine in the factory, use a rocket on his voodoo doll to knock him down and cause damage. Hit the doll once to break his shield. You can then shoot him until he reaches the bottom floor. Note: If he completes his ritual with the voodoo doll, it will send you flying and inflict lots of damage.
To kill The General in the mall, use the saved rockets to blow up his armored Bulldog, then shoot him with any gun until he dies. Note: Do this quickly before he runs away.
To kill Veteran Child in his club, bring lots of ammunition. Use the stun grenades located around the pillars to separate him and Shaundi, then just run up and shoot him. Repeat this until he is dead.
Go to the music store, and purchase the "A-HA" song under the rock section. Jump in a car, and pause the game. Go to the radio option, add that song to your playlist, and save it. Resume the game, and select the "Myradio" station. The song should play, and your character should sing along to it, thus getting you the achievement.
Accomplish the indicated achievement to get the corresponding number of Gamerscore points:
Additionally, there are ten secret achievements: