Folklore Elfs

What games have added in the mythological fairy, sidhe, Norse alf? What were their rules? How does one incorporate them into a game?

You might want to have a look at the wood elves from warhammer fantasy. They reside in deep forests and steal human children. Some of them return as mages. Sometimes they attack humans, sometimes they suddenly appear to help them in battle. No one can really figure out why they are doing things.

I know there's a lot of backlash against the game since, but I felt the original editions of 7th Sea handed the Sidhe very well in their fluff.

I know where I am from, Elves typically are house spirits like Hobbs and shit. Guard your home and your family if you aren't a broken family.

Wasn't there a Camelot themed game that had the sidhe as an etherial enemy race?

It's interesting that there's been such a backlash against the concept of the diminutive elf. I know a lot of people don't like the modern associations it has, but the concept of the little people living in the hollow mounds has been around for a long time, at least as long as the idea of elves being tall and beautiful.

Longer, there is far more rich and detailed information about Elves being child-snatchers, evil and twisted forest spirits than there are of them being the fair haired immortals of grace we tend to see them now.

Personally, I love the opposite. The closest media I could place them to would be something out of Hellboy, the comics and the moives generally do a good job of visually representing older or alternative mythology.

Well, there's overlap too. Even the tall and beautiful elves were thought to be cruel and possibly even soulless, and there are stories about them stealing humans and leaving changelings too.

>believing christian propaganda
My fair Ljósálfar would never do such a thing!

Dude, our earliest source about the Ljósálfar IS Christian and describes them in seemingly angelic terms.