No missable achievements (plus 21 unknown)
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Build a watch tower.
Eliminate 10 enemy units.
Hold a fertility festival in one of your settlements.
Achievement for playing 1h or more.
Achievement for a completing the tutorial.
Achievement for a first game won.
Hold 80% more of all the occupiable territory combined.
Playing the first multiplayer game.
Eliminate 100 enemy units.
Declare war against a much larger nation.
Make a treaty with another culture.
First multiplayer game won.
Being very much hated by the AI players.
Achievement for playing 24h or more.
Achievement for 10 games won.
Win a game playing as Sparta.
Win against the Inhuman-AI.
Eliminate 1000 enemy units.
Being very liked by the AI players.
Creating a ballot to be voted on by others.
Casting a vote on a ballot.