Into the Royal Tombs

From publisher blurb:

The tombs near the village of Orek provide some wealthy people with a comfortable eternal resting place. Your party comes here to rescue some hapless tomb raiders, but there's nothing to stop them from skimming a little treasure for themselves — except vicious traps, undead who object to being plundered, and even kobolds who claim the necropolis as their new turf!

Into the Royal Tombs is published under the Open Game License. It does not specify a particular campaign setting, and it allows you to integrate it into your own campaign world by filling in various details. You can use it as a stand-alone module, or run it as a sequel to Places by the Way #11, Tomb Raiders of Orek.