Era of Conquest — Difficulty & AI

What the three levels change, and why easy does not make the AI stupid · Operator: Chenyjunny

Difficulty is chosen alongside your scenario and objective, and it is a smaller dial than you might expect — because in this game the scenario is doing most of the work of setting how hard a match is. What difficulty changes is the rival nations: how big their armies get, and how boldly they use them.

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Easy — the AI is smaller, not dumber

On easy, rival nations produce at 60% efficiency. Every province they own yields 60% of the troops and 60% of the gold it would otherwise. Their decision-making is left exactly as it is on normal.

This is a deliberate design choice and worth explaining, because most strategy games do the opposite. The obvious way to build an easy mode is to make the AI make worse decisions — have it attack when it shouldn't, or fail to defend. That was tried here and it does not work well: an AI making bad decisions either freezes into a stalemate or throws its armies away, and neither is fun to play against. It also just looks broken.

Scaling the economy instead gives a clean, smooth dial. The enemy still plays sensibly, still defends its chokepoints, still does diplomacy — it is simply a smaller nation than it would otherwise be, and you can out-produce it. Nothing about it looks incompetent, which matters when the whole appeal is a world that feels like it is playing for real.

Play easy when you are learning, or when you want a hard scenario to be survivable.

Normal — the comfortable default

Full economy, and cautious military behaviour. The AI keeps a safety margin before it attacks, so it will not commit to a fight that looks close. It does not concentrate its troops into a spearhead, it does not hold back a defensive reserve, and it fights on one front at a time.

The practical effect is that normal AI is predictable in a good way — it will not surprise you with a sudden stacked breakthrough, and you can usually see an attack coming from the border build-up. Most players win most matches here.

Hard — it starts playing properly

On hard the AI keeps almost no safety margin before attacking, concentrates its troops into breakthrough stacks, holds a defensive reserve for counterattacks, and attacks a single target from several provinces at once.

That combination is what makes hard genuinely difficult. The safety margin is the big one: on normal you can leave a border slightly under-defended and get away with it, because the AI will not take a close fight. On hard it will. And because it concentrates, the attack that arrives is bigger than the border strength suggested.

It is still winnable by design — it fights one war at a time, so there is always a direction you can push while it is committed elsewhere. Play hard when normal has stopped threatening you.

What every difficulty does

Some AI behaviour is on at all three levels, because switching it off makes the world less interesting rather than easier:

Coalitions against the leader. Nations turn on whoever is running away with the game — including you. See the diplomacy guide.
Piling on the wounded. A nation already fighting a war is a more attractive target, so a war on one border can invite a second.
Reading army strength, not just territory. The AI notices a neighbour who looks small but has stacked an army, and it notices when yours is spent.

Personalities — why two matches never feel the same

Separately from difficulty, every rival nation is assigned a personality at the start of the match. It shifts how that particular nation behaves without making it stronger or weaker overall:

Balanced — plays the difficulty's baseline, no bias.
Warmonger — a much lower bar for declaring war. Expands fast and picks fights it might not win.
Turtle — a much higher bar, and keeps a defensive reserve. Attacks only on a sure thing, and is unpleasant to invade.
Opportunist — slightly bolder than baseline, and specifically watches for neighbours who have just spent their armies. It will hit you in the window right after you take a province.

The assignment is shuffled at the start of each match, so the same scenario gives you a different set of neighbours every time — the aggressive one might be on your border this game and across the map the next. The personalities are tuned to change behaviour rather than strength, so they do not quietly shift the balance of a scenario.

Choosing your challenge

Because scenario and difficulty are separate dials, you have a wide range of them:

First game: Korean Unification, normal. One border, no diplomacy.
Learning the systems: a nation scenario on normal — there is enough neutral land that mistakes are recoverable.
Real challenge without frustration: a nation scenario on hard. The AI plays sharply but you still have room to expand into.
Hard scenario, first attempt: Europe by province on easy. Full-strength decisions from a smaller enemy is the right way in.
The deep end: A Divided Korea on hard. One province, twenty-seven rivals your size, all playing properly.

If you want a challenge that comes from your own play rather than the AI's numbers, look at combat handoff in the delegation guide — it hands you the battles and automates everything else.

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Guides: About & how to play · Scenarios · Victory conditions · Combat & economy · Diplomacy · Delegation

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