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