The modifications in Speedy Gondolaz have been designed to speed up the game so that it doesn't drag on for hours and hours, even on a huge map, yet you still get all the fun and depth of CIV III as before. The big change is the growth of cities - twice the speed as each citizen only eats ONE food. Tech rates are halved. Workers work twice as fast. Settlers have two movement points and are cheaper. Culture rates are doubled. Cities are content longer. Corruption is lower. Plus other tweaks.
Requirements: 1.16f and later.