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