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.
Unlock 45 Artefacts at the Archivist.
Complete level 5 of Ascension Mode with any Master.
Complete all missions with the Engineer.
Summon 10 monsters in front of the Ninth Door.
Unlock 35 Artefacts at the Archivist.
Complete all missions with the Enchantress.
Kill 3 heroes simultaneously with a trap.
Complete all missions with the Slaveholder.
Recruit 5 rare monsters with the Headhunter.
Kill 3 heroes with a single attack.
Unlock 25 Artefacts at the Archivist.
Apply 20 stacks of "Bleeding" to a single hero.
Upgrade a monster to max level.
Gather 5 Artefacts during a game.
Use only the same type of monsters during a dungeon.
Finish a game without seeing the Therapist.
Kill a Champion.
Make 3 heroes flee.
Steal 10 Artefacts from the Collector.
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.