Missing Link Achievement in Halo: The Master Chief Collection

This guy is in a tree across the river at the part where the pelican is under attack, right after Rally Point Bravo in Sierra 117. Here's a link to a video guide: https://www.youtube.com/watch?v=FuXgvkFcg8I&feature=youtu.be

Video Guide Here: https://www.youtube.com/watch?v=MSDunGvU5-s

VIDEO GUIDE (All 3 Easter eggs) http://youtu.be/aJmbkokv1Dk Halo MCC Playlist: http://bit.ly/1xkAfKP

VIDEO GUIDE https://www.youtube.com/watch?v=PgX_Z3exX6I

Glitched for me. Staring at it for 2 or so minutes, shooting, zooming in and out nothing. Not 100% unlocked

Halo 3 First Run Guide. All Collectable and missions specific Achievements. Achievements are time stamped in descriptions. https://www.youtube.com/watch?v=0vLLLhht_cE

Here is an achievement guide for "Haplorrhini" "Primate" and "Missing Link" with English Commentary! http://www.youtube.com/watch?v=eP6OZzj4zVw Here is a playlist of achievement guides in HMCC http://www.youtube.com/playlist?list=PL-HeW6XkKdULr5ehVJIQ4dICwEV_0omlB

You can do this on EASY You DON'T have to start at the beginning! Start at BRAVO rally point (you can use Battle Rifle for all 3! You don't need sniper). And immediately get: "Missing Link: Watching. Waiting. Plotting." Go a little further into the forest with the Jackal snipers and get: "Primate: Halo 3: Find your first missing links." Then at the end of the level you don't have to kill everyone (probably should kill Chieftain so he doesn't kill you), and look across the water to get: "Haplorrhini: Halo 3: Find a lonely missing link." finished in about 6 minutes.