Buddy Missions are side-missions in Far Cry 2.
Upon completion of the tutorial, the player will be able to take side work from the other mercenaries at Mike's Bar. These missions are considered favors and do not pay with diamonds. Rather, they increase the player's reputation and history with that certain buddy.
The player can complete a total of sixteen Buddy Missions, with eight in each territory. Their best buddy and backup buddy give out two each from the beginning of the game, and a random mercenary will give out another two once the faction missions have been started. Upon completing the mercenary rescue mission for the doorman of the UFLL headquarters in each act, the rescued mercenary will give out a further two missions.
When the player completes the set of missions for a mercenary, they may become their best buddy or backup buddy if the player had little to no history with their original.