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