FIVE OPENINGS: Short Version
Note, these openings are ideal types: the variations of each involve pursuing other useful techs that complement the general aim of each opening.
Warrior King's Opening (15 advances)
War,Cer,Alp,CoL,Mon,Feu; Bro,Chi; --> Cur,Tra,Mas,Cst,Whe,Eng.
WoWs to pursue: Great Wall; King Richard's Crusade; Sun Tzu's War Academy;
Rationale: You believe science is best pursued by conquest.
MidGame Objectives: Gunpowder, Metallurgy, Leadership
Philosopher King's Opening (12 advances)
Alp,Cer,Mys,CoL,Wri,Lit,Rep,Phi, --> Pot,Hor,PT,MT
WoWs to pursue: Great Library, Hanging Gardens, Oracle, Michaelangelo's Chapel
Rationale: Happiness and Population Growth will lead to a bigger civilization, which will be more able to dominate other civilizations in the later game.
MidGame Objectives: Democracy, Sanitation, Explosives
Merchant Prince's Opening (13 advances)
Bro,Alp,Cur,CoL,Map,Wri, --> Tra,Lit,Rep,Bank --> Ast,Sea,Nav
WoWs to pursue: Colussus, Lighthouse, Magellen's Voyage
Rationale: Pursue science through trade routes; make money, lots of money, and then "bribe" your opponents into submission
MidGame Objective: Economics, Magnetism, Democracy
Ancient Mariner's Opening (10 advances)
Alp,Map,Pot,Sea; --> Cer,Mas,Mys,Mat,Ast,Nav
WoWs to pursue: Lighthouse, Magellen's Voyage
Rationale: Early exploration will lead to science and new cities through "goody huts"; establish the basis for sea power in the middle game;
MidGame Objective: Magnetism, Steam Engine
Natural Philosopher's Opening (13 advances)
Alp,Cer,Mys,CoL,Wri,Lit; --> Mas,Phi,Mat,Bro,Ast,Univ,ToG
WoW's to pursue: Colussus, Great Library, Copernicus's Observatory, Newton's College
Rationale: Establish and maintaining a clear advantage in science by creating the Science City (SSC).
MidGame Objective: Invention, Railroad (i.e., Darwin's Voyage)