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