Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Rock and a Hard Place	Kill 10 units with one Barricade.
A fine addition to my collection	Unlock a Sigil.
Against All Odds	Clear a stage with 8 or more Runes.
Breaker of the Oathbreaker	Defeat the Oathbreaker.
Breath of the Wild	Place all three special terrain tiles (Meadow, Oasis, Mountain Peak)
Brothers in Arms	Kill 300 units in a single stage with allied units.
Feng Shui Master	Place a Dungeon to get three different land effects.
Friendly Fire	Free Wilson.
Gotta Catch 'em All	Unlock all Charms.
Infinity Stones	Unlock all Runes.
It's a Secret to Everybody	Discover a Secret Dungeon.
It's super effective!	Break the armor of an armored unit.
Land Lord	Build 40 tiles.
Master of Puppets	Kill 10 units in a single stage with mind-controlled enemies.
Master of Traps	Unlock all consumable traps.
Pied Piper	Have a single Lure Trap lure 500 enemies.
Plague Doctor	Defeat the Harbinger of Plague.
Second Thoughts	Reclaim a tile.
Slot Machine	Unlock all Sigil Slots.
Sustainable Future	Reach wave 50 in Endless Mode.
The Complete Lexicon	Unlock all Sigils.
The More the Merrier	Achieve a 9 combo kill.
The Technology is Finally Here	Use two save slots.
Third Time's the Charm	Unlock a Charm.
This is Sparta!	Kill 300 units by making them fall in a single stage.
Transcendent	Ascend.
Turbo Lover	Reach Anima Engine Level 6.
Unchained	Free the Necromancer.
Whack-a-Worm	Defeat the Worm.