Beat Medium Mode

Mines (5 Gem cost).

Running Ability

Beat Easy Mode.

Various bonuses

Complete the indicated level to unlock the corresponding bonus:

* Run ability - Special 1 (Easy).

* Screen hitting lightning - Special 1 (Hard).

* Mines - Special 1 (Medium) Press Square to place a mine at a cost of five gems.

# All primary weapons

Successfully complete the game on the Recruit or Contractor difficulty to unlock all primary weapons (assault rifles, shotguns, etc.).

# All secondary and special weapons

Successfully complete the game on the Professional difficulty to unlock all secondary and special weapons.

# Professional mode

Successfully complete the game on the Recruit or Contractor difficulty to unlock the Professional difficulty.

# Switch characters anytime in Campaign mode

At the campaign menu, select "Start New Campaign". Select the character you want to play as, then go back to the Campaign menu, and select "Continue Campaign" to start with the character you selected. -From: Erik Z

Bonus items 

Successfully complete the indicated mission to unlock the corresponding item: 

Mission 1: Silver brass knuckles 

Mission 2: Silver bullet proof vest 

Mission 3: Gold taser 5 shots 

Mission 4: Holster 

Mission 5: Rubber soles

Brutal difficulty

Successfully complete the game to unlock the Brutal difficulty setting.

Play as Suzuki

Download the demo of Hot Shots Golf: Out Of Bounds from the PlayStation Network to your hard drive to unlock Suzuki in the full version.

Loyalty bonuses

Reach the indicated loyalty level to unlock the corresponding bonus:

Level 4: Rising and homing

Level 7: Club level 2

Level 10: Spiral

Level 11: Club level 3

Level 12: Impact improves

Completion bonus

Successfully complete Campaign mode to unlock the character, environmental, and weapon concept art at the " Extras " menu.

Otacon's extra passwords 

Put these in instead of the code Otacon tells you to at Shadow Moses. You will get the Access Denied scene but afterwards you will get the bonus. Cheat Effect

14893 100,000 DP 

78925 iPod song 

13462 iPod song 

Metal Gear Solid 4 Passwords

Extras Screen Passwords 

These passwords are entered at the Extras screen under Password after beating the game once on any difficulty.