"The kind of classic fifties-era first-contact story that Jonathan Swift
might have written, if Jonathan Swift had had a background in game
theory."
-- (Hugo nominee) Peter Watts, "In Praise of Baby-Eating"
Three Worlds Collide is a story I wrote to illustrate some points on naturalistic metaethics and diverse other issues of rational conduct. It grew, as such things do, into a small novella. On publication, it proved widely popular and widely criticized. Be warned that the story, as it wrote itself, ended up containing some profanity and PG-13 content.
- The Baby-Eating Aliens
- War and/or Peace
- The Super Happy People
- Interlude with the Confessor
- Three Worlds Decide
- Normal Ending
- True Ending
- Atonement
PDF version here.
There's quite a number of HPMOR readers who've never read HP. Admittedly this may be a special case, and it's not HPMOR's original intended optimal use-case either (reading Philosopher's Stone first is a good idea if you can).
I was a lifelong HP fan before reading HPMOR - and I would almost certainly never have read it if it wasn't HP fanfiction. (Or popular on TVtropes, but that's another matter.)