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