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