Complete all Escort activities for the indicated gang to unlock the corresponding bonus:

Unlock Anchor Vehicle:
Complete the Westside Rollerz Escort activities.

Unlock Dressed To Kill Clothing:
Complete the Los Carnales Escort activities.

Unlock Samantha Homie:
Complete the Vice King Escort activities.

Unlock The Job (Hummer H1 limousine):
Complete all Escort activities.

Complete the following Storylines to unlock the corresponding vehicles. To unlock them ALL complete the Westside Rollerz, Los Carnales and Vice Kings missions. These vehicles cannot be customized.

Unlock Los Carnales Vehicles:
Beat the 'What Goes Up...' mission.

Unlock Vice Kings Vehicles:
Beat the 'The Return of the King' mission.

Unlock Westside Rollerz Vehicles:
Beat the 'Semi Charmed Life' mission.

Unlock Raycaster - Dex's Car:
Beat the 'What Goes Up...' mission.

Unlock Zenith - Johnny's Car:
Beat the 'The King And I' mission.

Unlock Attrazione - Julius Little's Car:
Beat the 'Semi-Charmed Life' mission.

Unlock Mag - Benjamin King's Car:
Beat the 'The King And I' mission.

Unlock Voxel - Lin's Car:
Beat the 'No Time To Mourn' mission.

The following Cribs are unlocked by successfully completing Missions. Each Crib contains a a Save-Point, Weapon Cache, a safe and a wardrobe.

Unlock Price's Mansion:
Complete 'Semi-Charmed Life'

Unlock Saints Row Loft Crib:
Complete 'Back To Basics'

Unlock Angelo Lopez's Beach House:
Complete 'What Goes Up...'

Unlock Benjamin King's Penthouse:
Complete 'Return of the King'

Unlock Infinite Stamina:
ALL Tags found and sprayed

Health Regenerates Fast:
Complete ALL 3 Insurance Fraud Activities

Unlock RPG Launcher:
Complete ALL 3 Mayhem Activities

Unlock Platinum RPG Launcher:
Complete ALL 3 Hitman Activities

Unlock Leather Face:
Complete ALL hijacking activities

Unlock Atrazione Exotic Car:
Complete ALL 3 Hitman Activities

Unlock Cheap Car Repair:
Complete ALL chop shops

Unlock Gold Plated GDHC .50:
Complete Projects Hitman

Unlock Grenade:
Complete High End Retail Mayhem

Platinum AS12 Riot:
Complete Airport Hitman

Platinum T3K-Urban:
Complete Chinatown Hitman

Receive Discount when Repairing Car:
Complete ALL Chop Shops

Reduced Damage from Bullets:
Complete Adept Way Insurance Fraud

Reduced Damage from Cars:
Complete Cecil Park Insurance Fraud

Reduced Damage from Explosions:
Complete Chinatown Insurance Fraud

Unlock Special Variant of Hollywood:
Complete Docks & Warehouses Chop Shop

Unlock Special Variant of Ricochet:
Complete Chinatown Chop Shop

Unlock Special Variant of Stiletto:
Complete Downtown Chop Shop

Unlock The Job (car):
Complete ALL the activities

Unlock 10% Stamina Boost:
Find ALL Los Carnales Tags

Unlock 10% Stamina Boost:
Find ALL Westside Rollerz Tags

Unlock 10% Stamina Boost:
Find ALL Vice Kings Tags

Unlock Molotov Cocktail:
Complete Barrio Mayhem

Unlock Pipe Bomb:
Complete Suburbs Mayhem

Unlock Titan Airport:
District - Wardill Airport Hijacking

Unlock Attrazion:
Truckyard District/Copperton Hikacking

Unlock Jewelery:
Suburb District - Tidal Spring Hijacking

Unlock Samantha (Hommie):
Red Light District - Bavogian Plaza Escort

Unlock Dressed to Kill (Clothing):
Airport District - Wardill Airport Escort

Unlock Anchor (Car):
Suburb District - Misty Lane Escort

With the game paused use the L or R trigger to get to your phone, use the dial function and try one of the following numbers

#10 God's Wrath
#12Gauge Gets you a 12 Gauge
#66639 Gets you money
#AMMO Gets you infinite ammo
#AQUA Gets you the Aqua car
#AS12Riot Gets you a AS12 Riot
#GDHC50 Gets you a GDHC .50
#Grenade Gets you a Hand Grenade
#Knife Gets you a Knife
#Krukov Gets you a K6 Krukov
#Molotov Gets you a Molotov Cocktail
#NR4 Gets you a NR4
#Pipebomb Gets you a Pipe Bomb
#Rocket Gets you a RPG Launcher
#Shepherd Gets you a .44 Shepherd
#SPRINT Infinite Sprint
#T3KUrban Gets you a T3K Urban
#Tombstone Gets you a Tombstone
#Vice9 Gets you a Vice 9

1-555-ITS-OVER Suicide Hotline
555-018-0174 Eagleline Yellow Taxi Service
555-455-8008 TNA Taxi Service
555-2626 Stocks
555-3493 Rim Jobs
555-3765 Brown Baggers
555-3863 Lik-a-Chick
555-5926 On The Rag Clothing
555-5966 Eye for an Eye Voodoo
555-6238 The Dead Cow
555-7296 On the Fence
555-9467 Legal Lee's
555-9473 Grounds for Divorce
911 Ambulance (To restore health)