Here is the full list of all 24 Legend of Keepers: Career of a Dungeon Manager achievements.
Complete level 10 of Ascension Mode with any Master.
Complete level 5 of Ascension Mode with any Master.
Complete all missions with the Engineer.
Unlock 45 Artefacts at the Archivist.
Complete all missions with the Enchantress.
Kill 3 heroes simultaneously with a trap.
Reach 260 weeks in Endless Mode.
Recruit 5 rare monsters with the Headhunter.
Reach 156 weeks in Endless Mode.
Complete all missions with the Slaveholder.
Apply 20 stacks of "Bleeding" to a single hero.
Kill 3 heroes with a single attack.
Unlock 35 Artefacts at the Archivist.
Finish a game without seeing the Therapist.
Gather 5 Artefacts during a game.
Kill a Champion.
Use only the same type of monsters during a dungeon.
Upgrade a monster to max level.
Make 3 heroes flee.
Unlock 25 Artefacts at the Archivist.
Steal 10 Artefacts from the Collector.
Summon 10 monsters in front of the Ninth Door.
Complete level 15 of Ascension Mode with any Master.
Complete level 20 of Ascension Mode with any Master.