- Complete on Veteran to earn 3 stars - No time limit, so take your time - A lot of enemies in this mission, including dogs, so use cover often - Two vehicle gunners in first area - Always make sure your health is restored to the max - When inside the building, make sure the room is clear of most of the enemies before retrieving codes - When you get to the rooftop, rush to where you need to upload the data and do so, then go back to where you came onto the rooftop from and hide behind an object - You can ignore most of the enemies if you want, but it's a good idea to take out the choppers - The toxic gas isn't really hurting you, so ignore it - Some enemies will come onto the rooftop towards the end of the upload, but they can be taken out easily; they use the stairs - Once upload is complete, the mission is over