Hey t_206, can you tell me whether at the time of completing the mission, you were playing solo or co-op? If co-op, as mentioned in the description of the achievement / trophy, you must be the host of the session for the achievement / trophy to be unlocked successfully. If this was not the case, you will need to complete the mission again. Please let me know if you continue to experience issues with the achievement / trophy after that!Originally Posted by t_206 Go to original post