1. Collectibles
1.1. All Poster Locations
1.2. All Stuffed Squirrel Locations
1.3. All Vehicle Key Locations

2. Miscellaneous
2.1. Have a Nice Trip! – Kill a Walker That Is Falling Due to Dismemberment
2.2. Boom! Who Needs a Headshot? – Kill 5 Walkers with One Explosion

The Missing 8
Find Every Poster
There are a total of 8 Posters in The Walking Dead: Survival Instinct. Finding all of them will earn you the “The Missing 8” trophy / achievement. Your progress will be saved every time you find a new collectible. There is no need to look for it again if you die.

WARNING: You cannot get all collectibles in one playthrough! You have to play through the story at least two times. At some points you can travel in two directions with your car. If you choose one location you won’t be able to visit the other unless you start a new game and replay the areas. All statistics (collectibles, kills etc.) will stay if you start a new game in the main menu.

See Walking Dead Survival Instinct Poster Text Guide

No Stone Left Unturned
Collect Every Stuffed Squirrel
There are a total of 16 Stuffed Squirrels in The Walking Dead: Survival Instinct. Finding all of them will earn you the “No Stone Left Unturned” trophy / achievement. Your progress will be saved every time you find a new collectible. There is no need to look for it again if you die. There are 16 areas in total and each of them has exactly one squirrel collectible.

WARNING: You cannot get all collectibles in one playthrough! You have to play through the story at least two times. At some points you can travel in two directions with your car. If you choose one location you won’t be able to visit the other unless you start a new game and replay the areas. All statistics (collectibles, kills etc.) will stay if you start a new game in the main menu.

See Walking Dead Survival Instinct Stuffed Squirrels Text Guide

No Down Payments
Find Every Useable Vehicle
There are a total of 4 Useable Vehicle Keys in The Walking Dead Survival Instinct. Finding all of them will earn you the “No Down Payments” trophy / achievement. If you die before reaching the next checkpoint you have to collect the last key again. They are not saved immediately.

WARNING: You cannot get all collectibles in one playthrough! You have to play through the story at least two times. At some points you can travel in two directions with your car. If you choose one location you won’t be able to visit the other unless you start a new game and replay the areas. All statistics (collectibles, kills etc.) will stay if you start a new game in the main menu. Choose all the locations on the right side during your first playthrough and choose all the ones on the left in your second playthrough.

See Walking Dead Survival Instinct Vehicle Key Text Guide

Have a Nice Trip!
Kill a Walker That Is Falling Due to Dismemberment
Location: Cabot Ridge
You can do this pretty much everywhere if you have a firearm and some ammo. The earliest chance is in the first area of the game, Cabot Ridge. After the opening sequence you will be told to collect some fuel and on the way you can pick up a rifle. Kill all walkers, except for one and shoot its leg. After a few shots the walker will fall down to the ground and while it is falling you have to shoot its head. Again, the kill has to be done WHILE the zombie is falling, not after it starts crawling.

Boom! Who Needs a Headshot?
Kill 5 Walkers with One Explosion
Location: Firesign Stadium
At the very end of the story you will have to defend a helipad. After that you will be shooting a machine gun that has infinite ammo. Lots of walkers will attack and there are several propane tanks nearby. Shoot one of these white colored propane tanks for a chance to kill 5 enemies with one explosion.
There are multiple propane tanks, so you have more than one chance. Let the walkers kill you if you need another try.