Using The Ruins Perilous
Each Ruin Level is designed for a Party of PCs of the same level. That is, the 1st level of the Ruins is suitable for a 1st level party, the 2nd level is suitable for a 2nd level party, etc. The Dungeon thus, when completed will be useable as a single, monolithic Mega-Dungeon that will take PCs from 1st to 20th level. But, if you need a single dungeon of a particular difficulty level, each level of the Ruins Perilous is able to stand alone. To faciliate this, each level also has a unique theme.
Click on one of the Links below to take a closer look at each level.