So yea like the title says, I got 25 achievements in a single game, partly because the end game was bugged so I couldn't finish the game (now fixed), but also there seems to be some achievements I'm sure I shouldn't have gotten.

Fx. this one

The Meek Shall Inherit the Earth

Win a game without declaring any wars.

ERhm I nuked my aponnenet 3 times, so yea.. I declared wars, many times.

Talk to the Hand

Finish a game where you refused every received demand.
And this, I accepted several demands. especially in the beginning where I was building my army.

Also I got this 

Pacesetter

Be the first to reach all six Eras in a single game.

and this in the same game.

From Zero to Hero

Be first to reach a new Era after reaching the previous Era last

Something is not working as intended. 

You got the harder achievements.. all at once ! I'm jealous ;)