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