And if not, what would you recommend using? I've always thought it would make for some interesting gaming.
There hasn't been a formally released Culture game, no. However:
- Joshua Newman's Shock: Human Contact is designed as a Culture-like game.
- Diaspora is a hard-science fiction game, based on FATE.
- Most interesting and speculative of all, Luke Crane, who wrote Burning Wheel, has announced he's acquired a licence. From the way he's announced it, it could be the Culture. Let's hope.
An unofficial Champions/Hero System adaptation has been done.
Its original website is missing, but it is archived at http://web.archive.org/web/*/http://www.sden.org/jdr/spaceopera/download/GB/IainBanks.pdf
as of this writing, the link works.