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