Here is the full list of all 62 Ravaged Zombie Apocalypse achievements.
Complete All maps once with 2 or more players: Hard
Finished Liberty on Hard
Finished Asylum on Hard
Finished Dustbowl on Hard
100 Kills: Harpoon Gun
Finished Canyon on Hard
Finished Chasm on Hard
Collect 50 Gas Cans
Complete All maps once with 2 or more players: Medium
100 Kills: Crowbar
Complete All maps once with 2 or more players: Easy
Escaped Liberty
Escaped Asylum
Escaped Dustbowl
Escaped Canyon
50 Kills: SCAR- L
Escaped Chasm
Kill 3 or more zombies with a soda bomb or mortar round
10 nut shots in one match
Kill four enemies at once
Kill five enemies at once
Kill three enemies at once
Kill an enemy with an explosive from 400 yards or more
Jump over 100 feet in the air with a vehicle
Get the Resource to 10 Checkpoints
Get the Resource to Final Checkpoint
Save 5 resources in one round
Capture the resource 3 times in one match
Fall at least 500 feet
Most headhsots in a match
At least 30 kills in a match
Kill 5 enemies in a row with the spiked bat
Kill an enemy with the spiked bat
Kill 25 enemies in a row without dying
Kill 10 enemies in a row without dying
Boom!
Kill an enemy with the soda bomb
Kill two enemies at once
Destroy 5 enemy vehicles
Kill an enemy from the gyrocopter or little bird
First death of the match
Most assists in the match
Avenge your last death
First kill of the match
Have the highest KDR in the match
Highest point total in the match
Winning always feels good
Run someone down with the vehicle
Shoot an enemy where it counts
50 Kills: Chainsaw
100 Kills: Sledgehammer
50 Kills: Uzi
50 Kills: MP5
50 Kills: AN94
200 Kills: 50cal HMG
500 Zombie Headshots
100 Zombies Ran Over
Complete all maps once solo: Easy
Complete all maps once solo: Medium
Complete all maps once solo: Hard
Finish each map 5 times