Piece And Pawn Only Massacre Games What are the fastest possible games in which only all pieces and all pawns are captured? I did some searching myself.
Pieces Only
[Title &quot;me, chess.stackexchange.com 3/2/2019, Non-Unique Proof Game In 13.5 Moves&quot;]
[FEN &quot;&quot;]

1. e4 e5 2. d3 d5 3. Qg4 Qg5 4. Qxc8+ Ke7 5. Qxb8 Qxc1+ 6. Ke2 Qxb1 7. Qxa8 Qxa1 8. Qxf8+ Kd7 9. Qxg8 Qxf1+ 10. Kd2 Qxg1 11. Qxh8 Qxh1 12. Qe8+ Kxe8 13. d4 Qe1+ 14. Kxe1 

Pawns Only
[Title &quot;me, chess.stackexchange.com 3/2/2019, Non-Unique Proof Game In 16.0 Moves&quot;]
[FEN &quot;&quot;]

1. e4 e5 2. f4 f5 3. g4 g5 4. h4 h5 5. d4 d5 6. c4 c5 7. b4 b5 8. a4 a5 9. bxa5  bxa4 10. cxd5 cxd4 11. exf5 exf4 12. gxh5 gxh4 13. Rxh4 Rxh5 14. Rxa4 Rxa5 15.  Rxd4 Rxd5 16. Rhxf4 Rhxf5
In the pawns only, you don't need to move so many pawns.  Getting the major pieces involved early seems to be fastest:

[FEN ""]

1.e4 c5 2.Qh5 Qa5 3.Qxh7 Qxa2 4.Qxg7 Qxb2 5.Rxa7 Rxh2 6.Rxb7 Rxg2 7.Rxd7 Rxf2 8.Rxe7+ Kd8 9.Qxf7 Rxd2 10.Qf5 Qxc2 11.Qxc5 Qxe4+  *


I was unable to find a faster version of the piece only.