I have a suggestion for an RPC, specifically a BtS re-run of JerVL's fabulous
Al Gore Challenge ("Beelining the Internet") from over two years ago. It is a highly entertaining story, so if you haven't read it yet, do that now

.
You are any US American civ, and you're sorely missing Internet access in your empire, so you do everything to change that -- and not much else.
You have to build the Internet.
You can not research,
or receive in trade, any technologies that are not strict prerequisites for Computers, and if there are multiple possibilities then the cheapest option has to be taken. Specifically, the following techs are
not allowed:
Hunting, AH, Archery, HBR
Poly, Mono, Theo, Divine Right
Aesthetics, Literature, Drama, Music
Mil Trad, Liberalism (!), Rifling
and any later techs that are not on the beeline (obvious at that point)
We start with Agriculture (which is not on the beeline), so we are allowed to use that tech.
Furthermore you must not build any wonders that do not directly contribute to your research output (commerce/gold/beaker wonders are allowed, as are the Pyramids since they enable Representation and the Oracle since it grants a free technology). You may capture wonders from the AI, but Al Gore does not like to go to war anyway...
Also, since Al Gore is an environmentalist, you can not build anything that adds

to your cities (Forge and Factory are notable here).
If you manage to build the Internet all victory conditions are open. Secondary goals (after the Internet is built) include: adopt Environmentalism ASAP, build a National Park, found Standard Ethanol (BIO FUELZ ZOMG!!1!1!), win a Diplomatic Victory.
If all goals have been met, you are considered a true Al Gore and win the challenge.
What do you think?