MISC CODES:

In each case, if you enter the code correctly, a chime sounds:
Bulletproof Lara -   Hold L1 and press X, R1, Triangle, R1, Square, L2. 
One-Shot Kill -   Hold L1 and press Triangle, X, Triangle, Square, L2, Circle. 
Show Enemy Health -   Hold L1 and press Square, Circle, X, L2, R1, Triangle. 


RAW CODES:

Infinite Health -  
20272E2C 3C01447A
20272E48 AC410638
20272E4C AC41063C 
Infinite Ammo -  
20254E68 00000000 
Infinite Grenades -  
2022CEF4 00000000 
1 Hit Kill -  
205FF2FC 00000001 
Invincible (God Mode) -  
205FF5C0 00000001 
Revisit Location & Story Boards -  
20104AD4 2402000F 
All Environment Concepts -  
10106EBE 00001000 
All Character Concepts -  
1010635E 00001000 
All Gear Concepts -  
1010725E 00001000