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