TRADESHIPS: you can build/nav/scuttle trade ships to make money
FUEL: ships need fuel to gain mobility
RES_POP: Research affects max sector population.
-NOFOOD No food is required.
+NOFOOD: No food is required.
BLITZ: Turns NOFOOD option on and players get infinite BTU's.
NONUKES: No nuclear weapons
NO_PLAGUE: Plague is disabled.
LOSE_CONTACT: In HIDDEN, lose contact after a few updates
ORBIT: Satellites can orbit the planet
BIG_CITY: 'c' sectors cost $, lcm, hcm to build and hold 10x civs
-INTERDICT_ATT Interdict units & mil as they move in after an attack
+INTERDICT_ATT: Interdict units & mil as they move in after an attack
The following options were introduced in the Empire4 Server:
-ROLLOVER_AVAIL: Unused production avail is rolled over across updates.
BRIDGETOWERS: You can build bridge towers, which allow you to build
bridges from them.
DEFENSE_INFRA: Use the new defensive infrastructure. Otherwise, use
MARKET: Time-delay market and trade.
LOANS: Allows S&L type interaction between countries.
LANDSPIES: Creates land unit style spies.
-PLANENAMES: Shows real names for planes.
NO_FORT_FIRE: Forts cannot fire.
NO_LCMS: The game doesn't need lcms to be played.
NO_HCMS: The game doesn't need hcms to be played.