Here is the full list of all 36 Grim Horde achievements.
Lead your armies without dying for at least 5 minutes.
Complete your first run.
Unlock your first upgrade in the Tech Tree and use it in-game.
Unlock and summon a new type of minion.
Complete 5 different paths in the Upgrade system.
Lead your armies without dying for at least 20 minutes.
Destroy 10 farms in a single run.
Defeat 300 farmers in a single run.
Destroy 100 Archers.
Destroy 20 Lookout Towers.
Defeat Cornelius Jr. for the first time using the Demon Mage.
Defeat Cornelius Jr. with the Necromancer.
Defeat Cornelius Jr. in less than 35 seconds.
Complete both the Workers' Rights and Overlord's Treat upgrade path.
Complete both the Workers' Rights and all of the specific minions' upgrade paths.
Complete the Engineering 101 and Special Blend upgrade path.
Unlock and use the Necromancy PhD Card upgrade.
Survive for five minutes using the Necromancer.
Unlock and use the Health Regen buff in-game.
Defeat 10 Golden Hood Archers.
Unlock the winter map.
Reap 50.000 souls in a single run.
Destroy 200 Winter Farms in a single run.
Use every available Upgrade Card in a single run.
Destroy 10 Winter Marketplaces in a single run.
Destroy 20 Winter Barracks in a single run.
Destroy 30 Winter Lookout Tower in a single run.
Collect 20 Potions in a single run.
Beat the Farmland using the Demon Mage and without any tech-tree upgrade unlocked.
Defeat the Cornelius Jr. Cousin in the Winter map.
Win the siege boss fight and recover the Necronomicon.
Reach an army with 165 minions using the Demon Mage.
Complete the Cave level.
Complete teh Cave level in less than 10 minutes.
Complete the Cave level with less than 30 seconds of residual time.
Collect all the pumpkins in the Cemetery bonus map.