Can't Find the game.dtd file
I can't find the game.dtd file the validate the XML. I though that was within the .jar file, but I couldn't find it there.
It is within the jar file at
/games/strategy/engine/xml/game.dtd, but you could've also just searched on github https://github.com/triplea-game/triplea/blob/master/game-core/src/main/resources/games/strategy/engine/xml/game.dtd