

I believe they all unlock the same missions, so there is no need to enter more than one - and it shouldn't matter which one you enter.

To unlock the extra missions enter one of the following passwords. These missions all deal with a predecessor of yours who were also sent to kill the Jackal. If you enter a correct password, you'll unlock a number of additional missions in the game. Click that and you'll be prompted to enter a password. If you click on it, you'll enter another menu with just one option: Promotional Content. In the menu, in the PC version of the game, you can find an item called Additional Content. If you've played the game before, or if you're a seasoned gamer, most of the information here should be somewhat trivial still, I hope that you might find some of it useful.

This page tries to explain various game mechanics that are dominant in Far Cry 2. The Far Cry 2 Survival Guide - Game Mechanics
