Achievement not triggering: Beat an AI opponent on "Hard" difficulty

Here’s the ultimate workaround for this issue:

After finishing the game, and seeing the “You’re victorious message”, you MUST go to the statistics. Do NOT click on “Return to map”.

Some achievements trigger only after going to the statistics screen for the first time. They don’t trigger when you finish the game, go back to the map, and then go to statistics. So far, I’ve found the following achievements to be bugged in this way:

  • beat the AI on X difficulty
  • collect 100 relics

Hope this helps everyone.