I beat my second 7/7 game. When I won, the dialogue (where the AI says stuff like "insignificant" and it tells you that AI progress increased because you blew something up) told me I unlocked 13 achievements (Fort Buster x2, Train Wreck x2, Win on a 40-planet map, Should have stuck with the emergent stuff, The best ice-cream x2, I get by with a little help from my friends, Derailed, In Memoriam Terra, Backstage Pass, and Bounced Out). However, Steam didn't give me any of these achievements. I'm not sure what I'm supposed to do. I'm attaching the save from after I won to show I beat AIs without cheats, and should have those achievements. I kind of suspect this is an issue with Steam or something, rather than AI war, although the help feature of steam linked me here, so I made this.
I haven't tried to reproduce the error because my last save was before the second home world assault, and, having already won it, don't want to spend another couple of hours redoing what I did (especially if it won't get me the achievements).