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