Dungeon Remains of Kel'Sheal

Publisher's blurb:

This dungeon is used for a terrible, deadly game run once a year. Poor peasants are taken here by nobility and pitted against both monsters and other contestants in the hopes of winning a life-changing some of treasure.

Your players are asked by a man whose daughter died in the games to infiltrate this year’s competition as peasants, then assassinate the nobles organising it when they greet the winners at the end. Only, the noble’s see what they’re doing from an entirely different perspective–a perspective that might cause your players to reconsider…