Tom Clancy's Splinter Cell: Pandora Tomorrow HD

Right at the end of the 2nd Mission (Cryogenic, Paris), you will drop down from a vent to speak to Coldeboeuf in order to complete your objective. After that, you will climb back into the vent and a timer will start. Look down below and there are guards waiting to kill Coldeboeuf. To prevent this from happening shoot the valve just behind the guards and this will save him and Warranty Period will pop soon as you extract. If you not deal with the guards, then he will not be saved and you will earn Recall Rejected. See the Supplement Guide for a more extensive guide on how to complete the level up to this very moment: LINK