Unlock Characters:
Sabre - Finish the Albania missions on Commander
Pius Platz - Finish the Albania missions on Lieutenant
Feral - Finish the game on Admiral
Quixada Christo - Finish the Brazil missions on Commander
Reaver - Finish the Algeria missions on Commander
Algerian Officer - Finish the Algeria missions on Lieutenant
The Specialist (Flatfoot) - Finish the Russia missions on Commander
Valeska Lukanov - Finish the Russia missions on Lieutenant.
Unlock Hints:
Unlock Art/Production (Art Gallery): Finish the game on Commander
Unlock Credits: Finish the game on Ensign or above.
Unlock Jukebox Songs:
Dance of the Unknown - Finish the game on Lieutenant
Insertion Suite - Finish the game on Lieutenant
Infiltrator - Finish the game on Lieutenant
Contortion - Finish the game on Lieutenant
Tari Tari - Finish the game on Lieutenant
KGM - Finish the game on Lieutenant
Gnostec - Finish the game on Lieutenant
Dark in Your Heart - Finish the game on Captain
Beach Bossa - Finish the game on Captain
Brazilicious - Finish the game on Captain
SOCOM II Finale - Finish the game on Captain
Unlock Movies:
Brazilian Intro Movie - Finish the Albania missions
Algerian Intro Movie - Finish the Brazil missions
Russian Intro Movie - Finish the Algeria missions
Making the SOCOM II Music Movie - Finish the game on Lieutenant
Unlock Weapons (Single Player):
SEAL Weapons - Finish the game on Ensign
Terrorist Weapons - Finish the game on Lieutenant
SAS Weapons - Finish the game on Commander
Spetsnaz Weapons - Finish the game on Commander
MGL (Multiple Grenade Launcher) - Finish the game on Captain
OICW - Finish the game on Admiral.