This one is easy because the only missable objectives are the time limit and save the tiger. Just stick to what you are supposed to do and you will have plenty of time left when you finish. The tigers give some people trouble so I will list there whereabouts. As soon as the truck crashes, head South and take the path on your left when you find it. Go into the woods, left at the Y and you will come upon a buffalo and tiger #1 fighting. Tranq the buffalo to break it up and gain the objective then gnab the tiger as well.Go back to the truck, turn left, go up the hill, and go left til you reach the temple to find #2. From there, head North and #3 will be waiting to the left of the buffalo. Head back to the truck the way you came, staying to the right to avoid the buffalo, head left towards the bridge and then hang a right into the woods to get to the rope bridge. Follow the path around and you will run smack into #4. Mission ends and achievement is yours!