Full list of all 38 Orcs Must Die! 3 achievements.
The base game contains 26 achievements, and there are 2 DLC packs containing 12 achievements.
Kill 10,000 minions.
Complete the main campaign.
Unlock all gear slots.
Earn 100,000 coin.
Beat the first war scenario.
Score 500,000 in any campaign scenario.
Purchase all upgrades for a single trap.
Upgrade a piece of gear.
Purchase a new piece of gear.
Kill 100 minions.
Acquire every item in the game.
Earn 5 skulls on every scenario of the story campagin on Rift Lord difficulty.
Complete the story campaign on Rift Lord difficulty.
Survive 10 waves in a single endless match.
Complete the Drastic Steps campaign.
Complete the Drastic Steps campaign on Rift Lord difficulty.
Earn 5 skulls on every scenario of the Drastic Steps campagin on Rift Lord difficulty.
Survive 25 waves in a single endless match.
Complete any Weekly Challenge.
Complete Tier 2 in Scramble.
Complete Tier 5 in Scramble.
Reroll a debuff in Scramble.
Score 5,000,000 in any endless match.
Score 5,000,000 total in Scramble.
Earn 1,000,000 coin.
Complete all acheivements.
Beat all "Cold as Eyes" scenarios
Kill 250 Cyclopes
Purchase all 3 pieces of "Cold as Eyes" gear
5 Skull one "Cold as Eyes" scenario on Endless
Kill 1000 Cyclopes
5 Skull all "Cold as Eyes" scenarios on Rift Lord
Beat all "Tipping the Scales" scenarios
Kill 250 Tuatara
Purchase one upgrade for any "Tipping the Scales" gear
5 Skull one "Tipping the Scales" scenario on Endless
Kill 1000 Tuatara
5 Skull all "Tipping the Scales" scenarios on Rift Lord