Here is the full list of all 40 Atom Zombie Smasher achievements.
Get 100 artillery kills in a mission.
Rescue 200 people in a mission.
Get 100 landmine kills in a mission.
Complete a level-4 outbreak mission.
Cleanse four Zed territories with one Llama Bomb.
Survive the night.
Destroy 50 Zed in one artillery strike.
Complete a level-3 outbreak mission.
Destroy a Mega Zed.
Destroy 50 Zed in one dynamite explosion.
Have a merc reach Level 5 veterancy.
Destroy 50 Zed in one landmine explosion.
Rescue at least 100 people in July.
Rescue everyone in a mission.
Rescue 100 people in a mission.
Destroy all Zed in a mission.
Unlock all the vignettes.
Complete the campaign.
Accrue 10,000 sniper kills.
Rescue 40 or more people in one helicopter pickup.
Accrue 10,000 infantry kills.
Accrue 10,000 artillery kills.
Accrue 10,000 landmine kills.
Accrue 10,000 dynamite kills.
Launch 500 Llama Bombs.
Complete a campaign with the Triplets modifier.
Complete a campaign with the Hardcore and Permadeath modifier.
Complete a 20,000 point campaign.
Accrue 500 gold medals.
Purchase a Llama Bomb.
Rescue 300 people in a mission.
Complete a mission under 30 seconds.
Rescue 100,000 people.
Rescue 10,000 scientists.
Use snipers to destroy 100 Zed in a mission.
Get 100 infantry kills in a mission.
Complete a campaign with the Alt. Spawning modifier.
Get 100 dynamite kills in a mission.
Complete a mission with 3 players.
Defeat Wave 7 in the KringleJammer mini-game.