Roll the Bones

Hey, look! A recommendation that's not Smallville! Roll the Bones by Vathara: http://www.fanfiction.net/read.php?storyid=1667457. This is a Sentinel/Yu-Gi-Oh crossover (Gen/PG-13). Even if you're not particularly fond of the the shows, the story is excellent. I especially like the relationships between Yugi/Yami and Seto--not sexual, but emotional. When Yugi/Yami is forced to kill a necromancer, he has difficulties dealing with his feelings of guilt and abandonment as his only remaining family (his grandfather) begins to pull away from him emotionally. Seto, who has been in a similar situation, reluctantly comes to his aid as they try to stop a duelist who has been bringing monsters from the Shadow Lands into the real world. To make things even more interesting, the story takes place in Cascade, Washington--home of a Sentinel and his Guide (who may have more in common with Yugi than either of them know).

I just have to say, all of Vathara's stories are excellent. Her Urban Legends stories are my favorites--many Airwolf crossovers! (I've always loved the Lady.) You can find her stories at http://www.fanfiction.net/ or http://traethlin.tripod.com/ (this site isn't updated as frequently).