Here is the full list of all 50 The Walking Dead: Survival Instinct achievements worth 1,000 gamerscore.
Chose to Travel at Least Once with Every Optional Survivor
Collected Every Stuffed Squirrel
Found Every Poster
Killed Walkers Using Every Melee Weapon
Killed Walkers Using Every Ranged Weapon
Consumed 50 MREs
Arrived at Final Destination with Only Male Survivors
Entered Sherwood Without Any Survivors
Survived 5 Breakdowns
Killed 5 Walkers in the Cabot Ridge Creek Bed
Completed the Game with Only 1 Firearm and 1 Bullet Left in Your Inventory
Killed a Walker That Is Falling Due to Dismemberment
Dismembered 250 Limbs
Dismembered All Limbs of 5 Walkers
Completed 25 Optional Objectives
Explored 25 Unmarked Travel Locations
Completed All Marked Destinations on the Map
5 Survivors Were Killed While Scavenging
Prevented 50 Walkers from Grabbing You
Found Every Useable Vehicle
Restored Survivors 25 Times
Completed a Marked Destination on the Map without Taking Any Damage
Completed a Marked Destination on the Map Using Only the Crossbow
Completed a Marked Destination on the Map Using Only Firearms
Consumed 250 Fuel
Shot a Walker with 10 Bolts without Killing It
Completed a Marked Destination on the Map without Killing a Walker
Completed the Final Marked Destination on the Map
Fired 300 Bullets
Arrived at Final Destination with Only Female Survivors
Completed the Third Act
Completed the Second Act
Pulled a Bolt From a Walker Then Killed Them With It
Shot a Walker in the Knee with a Bolt
Prevented a Walker from Damaging You by Severing Its Attacking Limb
10 Walkers Were Killed with Saw Blades in the Logging Camp
Killed 100 Walkers while Grappling
Completed the First Act
Perished 13 Times
Killed 5 Walkers with One Explosion
Distracted 50 Walkers with Items
Sprinted Until You're Exhausted 10 Times in One Level
Explored an Unmarked Travel Location
Dismissed a Survivor
Killed Multiple Walkers with One Bullet
1 Optional Survivor Recruited
Performed Execution Kills on 50 Walkers
Killed 4 Walkers in a Single Grapple Sequence
Completed a Marked Destination on the Map without Being Grabbed by a Walker
Completed the First Location