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