After winning a game on Metropolis difficulty, I got the Steam achievements for winning on Metropolis, Nation and Humankind.

Game details in case it matters:

Mode: Singleplayer

Size: Normal, Player + 4 CPUs

Pace: Normal

End Conditions: Default

Extra: I won by Score/Fame on turn 300, and it was the very first game I made after launching.

Obviously there are more pressing game-breaking bugs for you guys to focus on right now, but it's still a bug to be aware of.