In Whisper mode you can both chat with someone privately and with someone in a different game room. Note: This only works with text chat but not voice chat. To do this, connect to the Internet in the game and enter a briefing room. Then enter a game and press Square to open the keyboard. Then, type /w'

Unlock the following weapons/skins by performing the corresponding tasks:

WEAPON/SKIN - HOW TO UNLOCK
9mm SMG single-player weapon - Complete North Africa missions SOCOM 3: U.S. Navy SEALs on the Ensign or higher difficulty setting, then use a USB cable to link to that game
STG 77 single-player weapon - Complete the Poland missions SOCOM 3: U.S. Navy SEALs on the Ensign or higher difficulty setting, then use a USB cable to link to that game
ZX25 Burst single-player weapon - Complete the South Asia missions SOCOM 3: U.S. Navy SEALs on the Ensign or higher difficulty setting, then use a USB cable
Benito Salazar Zayas multiplayer skin - Complete the single-player Poland missions in SOCOM 3: U.S. Navy SEALs, then use a USB cable to link to that game
Colonel Al-Kamil Sarwat multiplayer skin - Complete the single-player South Africa missions in SOCOM 3: U.S. Navy SEALs, then use a USB cable to link to that game
Dr. Basia Mironova multiplayer skin - Complete the single-player Poland missions in SOCOM 3: U.S. Navy SEALs, then use a USB cable to link to that game
Elite SEAL multiplayer skin - Complete all Instant Action missions
Gamal Imad multiplayer skin - Complete the single-player Asia missions in SOCOM 3: U.S. Navy SEALs, then use a USB cable to link to that game