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