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 main campaign.
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.
Beat the first war scenario.
Survive 10 waves in a single endless match.
Unlock all gear slots.
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.
Kill 10,000 minions.
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 500,000 in any campaign scenario.
Score 5,000,000 in any endless match.
Score 5,000,000 total in Scramble.
Earn 1,000,000 coin.
Complete all acheivements.
Purchase a new piece of gear.
Purchase all upgrades for a single trap.
Upgrade a piece of gear.
Kill 100 minions.
Earn 100,000 coin.
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