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 infantry kills.
Accrue 10,000 sniper kills.
Accrue 10,000 dynamite kills.
Accrue 10,000 artillery kills.
Accrue 10,000 landmine kills.
Get 100 landmine kills in a mission.
Destroy 50 Zed in one landmine explosion.
Get 100 dynamite kills in a mission.
Destroy 50 Zed in one dynamite explosion.
Complete a mission under 30 seconds.
Rescue 300 people in a mission.
Complete a 20,000 point campaign.
Unlock all the vignettes.
Use snipers to destroy 100 Zed 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 a campaign with the Hardcore and Permadeath modifier.
Complete a campaign with the Triplets modifier.
Rescue everyone in a mission.
Complete the campaign.
Complete a campaign with the Alt. Spawning modifier.
Complete a mission with 3 players.
Rescue 200 people in a mission.
Destroy a Mega Zed.
Get 100 infantry kills in a mission.
Complete a level-3 outbreak mission.
Get 100 artillery kills in a mission.
Have a merc reach Level 5 veterancy.
Complete a level-4 outbreak mission.
Destroy 50 Zed in one artillery strike.
Defeat Wave 7 in the KringleJammer mini-game.
Rescue at least 100 people in July.
Destroy all Zed in a mission.
Survive the night.
Rescue 100 people in a mission.