Full list of all 64 SAS: Zombie Assault 4 achievements.
The base game contains 59 achievements, and there is 1 DLC pack containing 5 achievements.
Personally curb stomp 1,000,000 zombies
Vaporize 10,000 zombies with the Aerial Bombardment skill (Heavy Class)
Open 10,000 Strongboxes
Successfully complete Power Out 1,000 times
Terminate 1,000 Zombie Mechs
Make 1,000 successful stands
Successfully escort the whiny VIP 1,000 times
Sell 5,000 weapons or gear pieces
Successfully defend the ship 1,000 times
Successfully extract the vaccine 1,000 times
Eviscerate 1,000 Devastators
Extinguish 1,000 Wickers
Successfully defeat the pods 1,000 times
Complete Power Out without any player on a 4 player team taking any damage from the central turrets
Reach level 50 with one character
Heal to death 10,000 zombies with the Zombie Antidote skill (Medic class)
Wipe out 10,000 zombies with the Assault Team skill (Assault class)
Snuff 1,000 Necrosis bosses along with all 3 children
Make a total of 1,000 augmentations across all weapons
Obliterate 5,000 Stalkers
Hold a level 20 character in each of the 3 character slots
Make a total of 1,000 augmentations across all armor pieces
Resist 1,000 zombie attacks using the Die Another Day skill (Heavy class)
Chew up 5,000 Spitters
Pick up $1,000,000 in SAS4 Cash loot drops
Defeat all zombies on Onslaught without allowing either of the ramp doors to fall
Open 100 Strongboxes
Complete Vaccine with a 4 player team where you extract the vaccine and get all 4 players on the ship in less than 5 minutes
Bash 1,000 zombies using the Close Quarters Combat skill (Assault class)
Drop 5,000 Bloaters
De-worm 1,000 Regurgitators
Bash through 5,000 Shielders
Kneecap 5,000 Runners
Survive Survivors 1,000 times
Destroy every breakable object in the VIP's mansion
Apply 25 total skill points on a single character between Health Regen and Energy Regen (at least 5 points in each)
Apply 25 total skill points on a single character between Fast Reload and Fast Movement (at least 5 points in each)
Apply 25 total skill points on a single character between Toughness and Body Armor Expert (at least 5 points in each)
Do not open any pods besides the boss pod
Kill 5,000 zombies using turrets
Evacuate the VIP without him taking any damage
Find all hidden stashes in the the original 7 maps
Fill any augmentation slot up to grade 10 on any single weapon or armor piece
Level up an Assault, Medic, and Heavy character to level 10
Complete Last Stand without letting a single zombie past the first barrier
Encounter and destroy 1 of each zombie, elite, and boss type
Kill 5,000 zombies using grenades
Allow every survivor to, well, not survive
Make a total of 50 augmentations across all weapon and armor pieces
Pulverize 5,000 Shamblers
Fill any augmentation slot up to grade 5 on any single weapon or armor piece
Complete Last Stand without a single zombie getting through
Reach level 11 with one character
Add your first augment to any weapon or armor piece
Open 10 Strongboxes
Rescue every single survivor on the Survivors map
Kill 5 or more zombies with a single car explosion
Slow 5,000 zombies with the Biocleanse Bomb skill (Medic class)
Reach level 2 with one character
Successfully complete Recovery 100 times
Squish 5,000 zombies while driving a vehicle
Complete Recovery without ever entering a vehicle
Crush a boss zombie while driving a vehicle
Flatten 20 zombies with a single drift