Just complete the tutorial. May unlock sometime later possibly due to a bug. In that case, you may try again to see if that will happen.

Play for 1 hour counted in your in-game profile, not the Steam count, and you'll get this one.

Win your first match on any map on single player mode, pretty easy.

Win 10 matches on any game maps on single player.

You have to win a match against the Inhuman IA, the most difficult level. There used to be a way to do it faster, but it seems it was patched or it's buggy now. Currently, to do it in an easy way, you can set up two civilizations far from each other (or they can be close, but I think that's risky) on Total Peace. I recommend disabling handicap in advanced settings too. Then you have to conquest territories, create soldiers while finding and keeping an eye on where the opponent's commander is. Surround them and grow a large army near their commander, break the peace treaty, declare war and attack the territory where the commander is. Earlier in the campaign settings, I recommend choosing an opponent civilization that starts with their commander near the sea and with little land to where they can escape; I did it against Egypt.

Win a match using Sparta as your civilization. Sparta always starts without any province, with just a ship on the sea, so this will take just a bit longer than usual.

Kill 10 enemy troops, not the number of soldiers.

Kill 100 enemy troops, may take a while.

This one makes people confused due to its name and by the way it can be unlocked. You probably won't get it on the vanilla Ancient Europe maps. It seems the only way to get it is by unlocking the free fantasy world map in the "Maps and Modding" section and doing any kind of treaty to another civilization, that's the method I used too.

Build an watch tower on a province you own. Watch towers can be used to spy on other civilizations.

Enact a fertility festival to raise your population. This can be done in your civilization or province details window.

Playing as a small civilization, declare war to a much larger enemy.

Conquest at least 80% of the whole map in a match, it includes protectorates on default settings.

The rarest achievement, though not the hardest. You have to make constant beneficiary treaties to all other non-enemy AI civilizations in the match, like giving money or selling provinces, to raise their opinion about you up to 90%. This can be checked on the "Opinions" window. To get this faster, you can try to set up a scenario with only allies and no enemies or neutrals and raise their opinion up to 90%.

Get hated by all the other AI civilizations in the match by decreasing their opinion about you down to 90% negative. Easily done by declaring war to them and sending various messages demanding to get out of your way.

When you become the most powerful civilization in the match, after conquering more territories than all others, create a ballot to get recognized as the dominant civilization in the world or to start an all-out war. You'll get this whenever they agree or disagree to do so.

Vote to recognize or not another civilization that requests to be considered the dominant one in the world or to start an all-out war.

Play for 24 hours on in-game profile count, not Steam count. You can check that looking at your Playing Statistics in Single Player mode.

Kill 1000 enemy troops, possibly the most time consuming achievement.

Simply play a multiplayer match over the web. You first must login to do so.

Play and win a multiplayer match.