There's a lot of different chapters currently in Crawl. Currently most of the levels don't actually get harder and typically have the same dungeon generation regardless of the chapter. Only the Robson's Cave and the Robson's Curse seem to do something; namely having a chance of contaning a Tax Collector's statue.
List of Possible Chapter names[edit | edit source]
Robson's Cave, Robson's Curse, Patterson's Curse, Scenitae Mounds, The Mercury Mines, The Cave of Penthe, Howe Maze