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