Spectrum of earliest recorded games and Greco's opening repertoire (1634 A.D.)

I used the site chessgames and analyzed 102 historical games/compositions for the period 1475-1634. They were known and used by Greco (1600-1634). It gives the following opening repertoire. 

• King's Gambit Accepted (Salvio gambit, C37) 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 ; (Bishop's gambit: Lopez, Cozio and Greco variations, C33) 3. Bc4 Qh4+ 4. Kf1 g5, 4...d6 and 4...Bc5 ; (Traditional variation: Philidor gambit, C38) 3. Nf3 g5 4. Bc4 Bg7 5. h4 ; (Kieseritzky gambit: Long Whip, C39) 3. Nf3 g5 4. h4 g4 5. Ne5 h5 ; (Bonsch-Osmolovsky variation, C34) 3. Nf3 Ne7 ; (Becker defense, C34) 3. Nf3 h6 ; (Lolli gambit, C37) 3. Nf3 g5 4. Bc4 g4 5. Bxf7+; (Muzio gambit, C37) 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3, 24 games.
• Giuoco Piano (C53, C54) 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5, 23 games.
• Bishop's opening (Boi variation: Lopez variation, C20 and C23) 1. e4 e5 2. Bc4 Bc5 3. Qe2 ; (Calabrese countergambit, C23) 2...f5 ; (Berlin defense: Greco gambit, C23) 2...Nf6 3. f4, 9 games.
• Latvian gambit (Mayet attack: Poisoned Pawn variation, C40) 1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 Qg5 5. d4 Qxg2 ; (Greco variation, C40) 3. Nxe5 Qe7 ; (Bilguier variation, C40) 3. Nxe5 Qf6 4. d4 d6 5. Nc4, 6 games.
• Philidor defense (Lopez countergambit, C41) 1. e4 e5 2. Nf3 d6 3. Bc4 f5 ; (C41) 3. h3, 3. Bc4 Bg4,  5 games.
• Greco/McConnell defense (La Bourdonnais gambit, C40) 1. e4 e5 2. Nf3 Qf6 3. Bc4 Qg6 4. O-O, 4 games.
• Sicilian defense (Wing gambit, B20), 1. e4 c5 2. b4 ; (McDonnell attack, B21) 2. f4, 4 games.
• Damiano defense (Damiano gambit, C40) 1. e4 e5 2. Nf3 f6 3. Nxe5, 3 games.
• French defense (Advance variation, C02) 1. e4 e6 2. d4 d5 3. e5 ; (Mediterranean defense, C01) 2...Nf6, 3 games.
• Owen defense (Matovinsky gambit, B00) 1. e4 b6 2. d4 Bb7 3. Bd3 f5 4. exf5 Bxg2 5. Qh5+ g6 ; (General, B00) 3...g6, 3...Nc6, 3 games.
• Fried Liver attack (C57) 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. Nxf7, 2 games.
• King's Gambit Declined (C30) 1. e4 e5 2. f4 d6 ; (Classical variation, C30) 2...Bc5, 2 games.
• Petrov defense (Damiano variation: Kholmov gambit, C42) 1.e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4 4. Qe2 Qe7, 2 games.
• Queen's Gambit Accepted (Central: Greco variation, D20) 1. d4 d5 2. c4 dxc4 3. e4 g5 ; (Old variation, D20) 3. e3, 2 games.
• Vienna game (Falkbeer variation: Vienna gambit, C28) 1. e4 e5 2. Nc3 Nf6 3. f4 ; (Stanley variation, C26), 2 games.
• Bird opening (From gambit, A02) 1. f4 e5 2. fxe5, 1 game.
• Boden-Kieseritzky gambit (C27) 1. e4 e5 2. Nf3 Nf6 3. Bc4 Nxe4 4. Nc3, 1 game.
• Falkbeer countergambit (C31) 1. e4 e5 2. f4 d5, 1 game.
• Panteldakis countergambit (C30) 1. e4 e5 2. f4 f5, 1 game.
• Queen's Gambit Declined (Austrian defense, D06) 1. d4 d5 2. c4 c5, 1 game.
• Saragossa opening (A00) 1. c3, 1 game.
• Scandinavian defense (Ilundain variation, B01) 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8, 1 game.
• Van't Kruijs opening (Reversed French, A00) 1. e3 e5, 1 game.

It seems that Greco knew the King's Gambit very well, possibly better than many modern masters. 

 Very good. You just forgot the Clemenz opening

I like this opening, just can't get enough 

Hey, p9tp! It's not me, it's Greco who forgot about Clemenz LMAO. 

80/102 games analyzed 

It's done. I'm surprised how well KGA was known at the time of Greco.