From publisher blurb: Did you ever wonder what happens when you fall into one of those "bottomless pits" or chasms in a roleplaying or video game? Now you no longer have to wonder, as this Fifth Edition adventure shows you exactly the horrors and dangers you’ll have to face once put into such a predicament. Crawler Chasm is a Fifth Edition plug-in adventure for four characters with an average party level (APL) of 5, 8, 11, or 14. This addon offers details for each level and makes adjustments accordingly.