You get tech bleed from all countries, not just allies.
Power report is only updated automatically, at the update.
Players get infinite BTUs.
You can build bridge towers, which allow you to build bridges from them.
Bridges can be built from any sector.
Sectors are damaged by radiation for a few updates after blast.
The world is told via news when deities are giving or taking things from players.
Gold and Oil are renewable resources.
Experimental stuff not ready for prime time. Enable at your own risk!
Hides information about countries you haven't contacted.
Interdict units & mil as they move in after an attack.
Allows S&L type interaction between countries.
In HIDDEN, lose contact after a few updates.
Enable time-delay market and trade.
Allows real-time updating of mobility.
No food is required.
Firing a ship's guns costs no mobility.
Forts cannot fire.
Plague is disabled.
Highways double as rail.
Research affects max sector population.
Gold bars aren't destroyed by shelling or bombing.
Technology costs more to make as your civilian population grows past 50,000 civilians.