Remember the good old days, when adventures were underground, NPCs were there to be killed, and the finale of every dungeon was the dragon on the 20th level? Those days are back. Dungeon Crawl Classics don't waste your time with long-winded speeches, weird campaign settings, or NPCs who aren't meant to be killed. Each adventure is 100% good, solid dungeon crawl, with the monsters you know, the traps you fear, and the secret doors you know are there somewhere. In Dungeon Crawl Classics #1: Idylls of the Rat King, our heroes defeated a vicious wererat and his minions. Now the Rat King is back! Investigating a ring of slavers, the heroes find themselves in the city's slums. Unknown to them, the entire dungeon is a ruse designed to lure them into the Rat King's clutches. Baited deep underground, the PCs square off against an army of wererats and slavers. When they face unbeatable odds, they can't avoid being captured and tossed into a dungeon cell! Bereft of armor, weapons or equipment, they must fight their way through a rat warren, past the collapsed tomb of an undead warrior, and back into the sewers of the Rat King! This world-neutral, stand-alone adventure is completely new, not a reprint. It uses the 3.5 edition of the d20 rules set, and is fully compatible with the worldÂ's most popular role playing game.