Full list of all 145 Across the Obelisk achievements.
The base game contains 129 achievements, and there are 2 DLC packs containing 16 achievements.
Unlock the pet: Slimy
Stack 50 Crack charges
Unlock the pet: Lianta
Stack 40 Bless charges
Craft 250 cards
Master Madness Level 1
Stack 200 Chill charges
Achieve Rank 35 with a Hero
Kill the boss: Ursur
Unlock the pet: Flamy
Discover what cultists throw into the pit
Upgrade 500 cards
Stack 200 Poison charges
Unlock the pet: Mozzy
Become the master craftsman's apprentice
Gain 100000 gold
Gain 100000 shards
Buy 50 items
Spend 250 supply on town upgrades
Unlock the character: Nezglekt
Stack 50 Fury charges
Stack 40 Insane charges
Stack 40 Regeneration charges
Unlock the character: Gustav
Fight for the crocomen after visiting their village
Unlock the character: Zek
Give the two beggars enough money to take the ship
Kill 50 Boss monsters
Stack 40 Sanctify charges
Stack 200 Spark charges
Kill the boss: Matriarch
Unlock the character: Grukli
Unlock the character: Malukah
Repair the altar to its former glory
Kill the boss: Belphyor
Defeat the game
Stack 200 Bleed charges
Kill the boss: Lord Hanshek
Stack 200 Burns charges
Unlock the character: Wilbur
Deal 400 damage with a single hit
Become the new champion of the arena
Kill the boss: Astarios
Unlock 90 warrior cards
Kill the boss: Scorn
Kill the boss: Rhodogor
Craft 100 cards
Stack 40 Thorns charges
Unlock the character: Cornelius
Kill the boss: Elder Dryad
Kill 500 monsters
Unlock the character: Bree
Unlock 90 healer cards
Stack 200 Block charges
Unlock 90 scout cards
Unlock 90 mage cards
Deal 150 damage with a single hit
Kill the boss: Faeborg
Kill the boss: Graendor
Unlock the character: Ottis
Sit on the mysterious throne
Achieve Rank 20 with a Hero
Kill the boss: Erekhal
Stack 50 Spark charges
Unlock the character: Heiner
Unlock the pet: Betty
Upgrade 100 cards
Kill 10 Boss monsters
Spend 30 supply on town upgrades
Kill the boss: Ignidoh
Unlock 60 warrior cards
Unlock 60 mage cards
Kill the boss: Minotaur
Stack 50 Bleed charges
Kill the boss: Yogger
Kill 200 monsters
Play 5 games
Unlock the character: Sylvie
Unlock 60 healer cards
Unlock 60 scout cards
Gain 5000 shards
Stack 50 Chill charges
Unlock the character: Thuls
Kill the boss: Tulah
Stack 50 Block charges
Stack 50 Poison charges
Gain 5000 gold
Spend 1 supply on town upgrades
Stack 50 Burn charges
Unlock 30 warrior cards
Unlock 30 mage cards
Unlock 30 scout cards
Save the baker's son
Unlock 30 healer cards
Achieve Rank 5 with a Hero
Upgrade 5 cards
Claim 1 treasure
Kill the boss: Ylmer
Deal 50 damage with a single hit
Buy 5 items
Craft 5 cards
Kill 20 monsters
Accidentally burns the baker's son
Unlock the pet: Stormy
Make a bet with the crocomafia and win
Feed the harpies
Fight for the lizardmen after visiting their village
Show who is the strongest on the battlefield
Claim 25 treasures
Play 1 game in cooperative multiplayer
Stack 200 Crack charges
Stack 200 Fury charges
Unlock the pet: Sharpy
Unlock the pet: Oculy
Unlock the pet: Orby
Unlock the pet: Asmody
Find a new member for the Tsnemo crew
Read what happened in the void
Kill the boss: Fred
Unlock the pet: Daley
Unlock the pet: Champy
Unlock the pet: Chompy
Unlock the pet: Chumpy
Deliver the Rime of the Ancient Mariner
Find the Happy Owl founder's runes
Have a big feast at the Happy Owl
Kill the boss: Ratone
Kill the boss: DT-800
Unlock the character: Laia
Unlock the character: Navalea
Kill the boss: Sandworm
Kill the boss: Mortis
Survive Basthet's ordeal.
Unlock the pet: Fenny
Unlock the pet: Holy Cuby
Unlock the pet: Dark Cuby
Make a wish to the Djinn
Get the Djinn to corrupt you a ring
Discover the secret chamber under the sands of Ulminin
Summon the three scarabs and let them run free
Fulfill the vision and complete the ancient mural
Play a game at the ancient machine