Hey guys and gals!
Heres my video guide on getting ALL achievements and collectibles in chronological order so you dont miss a thing!
Hope this helps!
0:20 - Collectible - Boar Skull 1/3
0:54 - Achievement - Botanist (Part1)
1:13 - Collectible - Mushroom 2/3
1:13 - Achievement - Edible
1:40 - Achievement - Botanist
4:20 - Collectible - Venus FlyTrap 3/3
4:43 - Achievement - Great Girl
5:40 - Acheivement - Be Prepared
8:41 - Achievement - Sureshot
10:10 - Achievement - Bonded
11:55 - Achievement - Moving Fast 13:20 - Achievement - Deadeye - Right at the end of Act 3, the school will be ablaze and attacked with Walkers. For this achievement, you need to hit mostly Walkers in the head with your bow. You CAN miss shots, and you CAN hit some in the body if you miss, but as long as the majority are Headshots, this achievement will unlock!
There are 2 waves of walkers, around 5 or 6, just keep running around if one gets too close and don't panic!