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.
Score 5,000,000 total in Scramble.
Complete Tier 5 in Scramble.
Reroll a debuff in Scramble.
Complete Tier 2 in Scramble.
Score 5,000,000 in any endless match.
Survive 10 waves in a single endless match.
Survive 25 waves in a single endless match.
Complete all acheivements.
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.
Earn 5 skulls on every scenario of the story campagin on Rift Lord difficulty.
Complete the story campaign on Rift Lord difficulty.
Complete any Weekly Challenge.
Acquire every item in the game.
Earn 1,000,000 coin.
Kill 10,000 minions.
Complete the main campaign.
Purchase all upgrades for a single trap.
Unlock all gear slots.
Earn 100,000 coin.
Beat the first war scenario.
Score 500,000 in any campaign scenario.
Upgrade a piece of gear.
Kill 100 minions.
Purchase a new piece of gear.
5 Skull one "Cold as Eyes" scenario on Endless
Kill 1000 Cyclopes
Beat all "Cold as Eyes" scenarios
5 Skull all "Cold as Eyes" scenarios on Rift Lord
Kill 250 Cyclopes
Purchase all 3 pieces of "Cold as Eyes" gear
5 Skull one "Tipping the Scales" scenario on Endless
Kill 1000 Tuatara
Beat all "Tipping the Scales" scenarios
5 Skull all "Tipping the Scales" scenarios on Rift Lord
Kill 250 Tuatara
Purchase one upgrade for any "Tipping the Scales" gear