Saints Row 2

To enter any vehicle in the game instance, you must first get on top of the vehicle (most easily accomplished with cars, and more difficult with other vehicles but still possible). Simply hit triangle to enter the vehicle as you normally would and you will instantly be inside the driver's seat. Works on unoccupied and occupied vehicles.

Complete the indicated activities or tasks to unlock the corresponding reward.

Brotherhood melee style: The Brotherhood mission 6.
Ronin melee style: Ronin mission 6.
Samedi melee style: Sons Of Samedi mission 6.

While on a dock, allow your character to remain idle for a short amount of time. He should walk up to the edge, take out a fishing rod, and begin to fish. He will continue to do so until you move him again.

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.

Complete the indicated activities or tasks to unlock the corresponding reward.

One follower: Prologue mission 4.
Two followers: 25% hood conquered.
Three followers: 50% hoods conquered.
Johnny Gat: Ronin mission 11.
Legal Lee: Fight Club Prison level 3.
Pierce: Brotherhood mission 11.
Shaundi: Sons Of Samedi mission 11.
Tobias: Sons Of Samedi mission 3.
Troy: Fight Club prison level 6.
Vehicle delivery for $1,000: Escort level 3 in Red Light District.
Vehicle delivery for free: Escort level 6 in Red Light District.

Successfully complete enough activities to raise your respect over level 99.

Dial the Phone Numbers in the phone book.

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".

Complete the indicated activities or tasks to unlock the corresponding reward.

Clothing store: Crowd Control level 3 in Suburbs.
Clothing store (more): Crowd Control level 6 in Suburbs.
Crib customization: Mayhem level 3 in Red Light District.
Crib customization (more): Mayhem level 6 in Red Light District.
Food and Liquor store: Septic Avenger level 3 in Red Light District.
Food and Liquor store (more): Septic Avenger level 6 in Red Light District.
Mechanic: Demo Derby level 3.
Mechanic (more): Demo Derby level 6.
Mechanic (even more): All Chop Shop lists.
Scratch That music store (free): Collect all 50 CDs.
Weapon store: Heli Assault level 3 in Trailer Park.
Weapon store (more): Heli Assault level 6 in Trailer Park.

When you take a human shield, switch to your Taser and press L2. This will save some ammunition.