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