At the Main menu hold LT, RT, LB, and RB and press Down, Up, Yellow, Blue, Down, Down, Yellow, Yellow and a new option will appear under Extras named Cheat. Select Cheat and a text window will appear and you can enter the following codes to unlock the corresponding effect. Unlock ALL Extras Unlocked:
KKmuseum

Unlock ALL Levels:
KKst0ry

Unlock 999 Bullets:
KK 999 mun

Unlock Rapid Healing for Jack only:
8wonder

Unlock One-Hit Kills (Bullets only):
GrosBras

Unlock 50 rounds for the Sniper Rifle and equips it:
KKsn1per

Unlock 500 rounds for Thomspon Machine Gun and equips it:
KKcapone

Unlock Unlimited Spears (reload to spawn spear):
Lance 1nf

Note: The text 'HOOT FORT' appears in the upper left of the screen during a mission when a cheat code is in effect.


Unlockables
Complete the following requirements during game play to unlock the corresponding effects

Unlock Weta Artworks - Environments Part 1:
5% Game Completion

Unlock 'Old Movie' Filter:
15% Game Completion

Unlock Weta Artworks - Environments Part 2:
25% Game Completion*

Unlock Weta Artworks - Creatures:
50% Game Completion

Unlock Weta Artworks - Kong Part 1:
75% Game Completion

Unlock 'High Contrast' Filter:
100% Game Completion

Unlock Horizontal Flip:
100% Game Completion*

Unlock Weta Artworks - Kong Part 2
20,000 Points Scored**

Unlock Weta Artworks - Environments Part 3
50,000 Points Scored**

Unlock Peter Jackson Interview:
75,000 Points Scored**

Unlock Weta Artworks - Kong Part 3:
100,000 Points Scored**

Unlock Weta Artworks: Kong Part 4:
150,000 Points Scored**

Unlock Philippa Boyens Interview:
200,000 Points Scored* / **

Save Kong...
250,000 Points Scored

* - Only works in conjunction with 'Online Code' - see www.kingkonggame.com. ** - Only when have got the 100% completion rate does the scoring system take effect.


Point Scoring System
When you have obtained 100% in the game and have saved your file the scoring system becomes unlocked. The maximum points that you can score in a level is 20,000. Below is a rough guide of the points which are given and deducted from your score depending on the circumstance.

Big Predators Killed:
+5,000 Points

Big Predators Killed:
+1,000 Points

Big Predators Killed:
+500 Points

Bullets Used:
-100 Points

Spears Used:
-20 Points

Deaths:
-5,000 Points

Injuries:
-1,000 Points

Friends Injured:
-1,000 Points

Attacks Attempted (KK):
-25 Points

Time Per Second (KK):
-10 Points

Note: some of these scores are halved on some stages, depending on the circumstances.


Unlock Artwork Gallery:
Complete the game

Spears and Bones:
Set alight spears and bones to make them more effective.