Castle of no Escape 2

As the description kind of implies, you need to complete the game without ever spending more than 30 seconds in a single room. This can be quite difficult to achieve legitimately, but thankfully there is a one Ritual that will save you the majority of the trouble. If you're going in order through the characters for their achievements for beating the game, both the Guardian and Huntress won't unlock this achievement, but the Cardinal will. So you'll want to follow Ears of ash (50G) and use that Ritual to start a game as the Cardinal. Now you just need to run through each room to head right for the boss glimmer to start the boss fight. This should be really easy to do since no rooms require you to kill all enemies to proceed, so you can just ignore enemies and head right for the next doorway. Once you kill the boss, this achievement will unlock at the end of your Cardinal playthrough.