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.
Complete the Drastic Steps campaign.
Acquire every item in the game.
Survive 10 waves in a single endless match.
Survive 25 waves in a single endless match.
Score 5,000,000 in any endless match.
Complete Tier 2 in Scramble.
Reroll a debuff in Scramble.
Earn 1,000,000 coin.
Complete any Weekly Challenge.
Complete the main campaign.
Kill 10,000 minions.
Unlock all gear slots.
Score 500,000 in any campaign scenario.
Beat the first war scenario.
Earn 100,000 coin.
Purchase a new piece of gear.
Upgrade a piece of gear.
Kill 100 minions.
Earn 5 skulls on every scenario of the story campagin on Rift Lord difficulty.
Complete the story campaign on Rift Lord difficulty.
Purchase all upgrades for a single trap.
Complete the Drastic Steps campaign on Rift Lord difficulty.
Earn 5 skulls on every scenario of the Drastic Steps campagin on Rift Lord difficulty.
Complete Tier 5 in Scramble.
Score 5,000,000 total in Scramble.
Complete all acheivements.
Purchase all 3 pieces of "Cold as Eyes" gear
Beat all "Cold as Eyes" scenarios
Kill 250 Cyclopes
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