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 character: Cornelius
Kill the boss: Erekhal
Spend 250 supply on town upgrades
Stack 50 Crack charges
Master Madness Level 1
Achieve Rank 35 with a Hero
Unlock the character: Gustav
Show who is the strongest on the battlefield
Kill 50 Boss monsters
Unlock the character: Nezglekt
Unlock the pet: Stormy
Unlock the character: Ottis
Stack 50 Fury charges
Unlock the character: Heiner
Stack 200 Spark charges
Stack 200 Burns charges
Stack 40 Bless charges
Unlock the character: Grukli
Kill the boss: Rhodogor
Unlock 90 healer cards
Unlock 90 warrior cards
Sit on the mysterious throne
Kill 500 monsters
Kill the boss: Minotaur
Defeat the game
Kill the boss: Lord Hanshek
Deal 400 damage with a single hit
Stack 200 Chill charges
Deal 150 damage with a single hit
Stack 200 Poison charges
Kill the boss: Graendor
Stack 50 Spark charges
Give the two beggars enough money to take the ship
Upgrade 100 cards
Unlock 90 scout cards
Achieve Rank 20 with a Hero
Play 5 games
Stack 50 Burn charges
Stack 40 Sanctify charges
Unlock 90 mage cards
Feed the harpies
Become the new champion of the arena
Kill the boss: Astarios
Unlock the character: Bree
Stack 50 Poison charges
Stack 40 Insane charges
Unlock the character: Wilbur
Kill the boss: Ignidoh
Stack 50 Bleed charges
Stack 200 Block charges
Stack 50 Chill charges
Spend 30 supply on town upgrades
Kill the boss: Faeborg
Kill the boss: Scorn
Unlock 60 warrior cards
Unlock the character: Thuls
Kill 10 Boss monsters
Kill the boss: Tulah
Unlock the pet: Flamy
Unlock 60 healer cards
Kill 200 monsters
Gain 5000 gold
Discover what cultists throw into the pit
Stack 40 Thorns charges
Stack 40 Regeneration charges
Gain 5000 shards
Unlock 60 mage cards
Craft 5 cards
Unlock 60 scout cards
Kill the boss: Belphyor
Kill the boss: Yogger
Buy 5 items
Stack 50 Block charges
Upgrade 5 cards
Deal 50 damage with a single hit
Unlock 30 warrior cards
Spend 1 supply on town upgrades
Unlock 30 scout cards
Unlock 30 mage cards
Unlock 30 healer cards
Kill the boss: Ylmer
Achieve Rank 5 with a Hero
Kill the boss: Elder Dryad
Claim 1 treasure
Play 1 game in cooperative multiplayer
Kill 20 monsters
Unlock the character: Malukah
Repair the altar to its former glory
Save the baker's son
Accidentally burns the baker's son
Unlock the pet: Betty
Unlock the pet: Slimy
Unlock the pet: Lianta
Make a bet with the crocomafia and win
Fight for the crocomen after visiting their village
Fight for the lizardmen after visiting their village
Buy 50 items
Craft 100 cards
Craft 250 cards
Upgrade 500 cards
Claim 25 treasures
Stack 200 Bleed charges
Gain 100000 gold
Gain 100000 shards
Stack 200 Crack charges
Stack 200 Fury charges
Kill the boss: Matriarch
Unlock the pet: Sharpy
Unlock the pet: Mozzy
Become the master craftsman's apprentice
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
Unlock the character: Zek
Unlock the character: Sylvie
Kill the boss: Fred
Kill the boss: Ursur
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
Summon the three scarabs and let them run free
Kill the boss: Mortis
Unlock the character: Laia
Unlock the character: Navalea
Kill the boss: Sandworm
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
Fulfill the vision and complete the ancient mural
Play a game at the ancient machine