Deity and Sid Strategy

0:28 On Civilization 3's top levels, Emperor, Demigod, Deity and Sid, your cities have fewer citizens born content, corruption is heavier, and the computer leaders build, research and negotiate harder than you; on Deity, Prima's official guide (p. 15) gives each city one content citizen and the AI 60 percent of your time to finish anything. The official advice that follows from those rules is to solve happiness before growth, trade with the AI on your terms, claim land while it is free, and fight early, before the AI's head start turns into a lead it cannot lose. The Complete manual (p. 31) describes Sid, added by Conquests with Demigod, as "the most punishing AI difficulty level ever seen in Civilization". This guide sets out what changes on each top level and the advice the manuals, Prima and Soren Johnson give; the full list of levels is on Difficulty Levels.

Quick facts

Source: Civilization III Complete manual, pp. 30-31; Prima's Official Strategy Guide, pp. 15-16 (2001, which covers the base game's six levels and names the fourth King).

What changes at the top

The Complete manual (pp. 30-31) says each level adjusts "the general level of discontent among your citizens and the average craftiness and intelligence of the AI leaders". Its descriptions climb from Emperor ("for those who feel the need to be humbled") through Demigod ("for the seasoned megalomaniac") and Deity ("Brutal, unforgiving and merciless") to Sid. Conquests added Demigod and Sid; GameSpot's Conquests review (Nov 18, 2003) found that the AI "seems to play a bit smarter" even on lower levels.

2:30 Prima's table (pp. 15-16) gives the numbers for the 2001 game. On Deity each city has one content citizen, so the second citizen is already unhappy; rivals finish units, buildings, wonders and research in 60 percent of the time you need; your units get no bonus against barbarians; corruption is higher; rivals are less lenient in negotiations, more aggressive and more likely to break treaties; and villages pay less often. Everyone still starts with 10 gold. In all other respects, Prima says, the AI plays at Prince level.

0:27 What the printed sources do not say matters too. No manual or guide read gives Demigod's or Sid's content citizens, build rates or corruption, nor the extra units or advances the AI may start with on any level. Suede's video on the levels, shown in the game's debug mode, says the AI starts with extra defensive units, Settlers and Workers on levels above Regent and gets extra free unit support. Treat any exact figure for Demigod and Sid as unconfirmed.

Solve happiness before growth

3:28 With one content citizen per city, every Deity city needs help from its second citizen on. Prima makes the same point many times: research Ceremonial Burial early "at higher difficulty levels" for Temples (p. 87); make the Temple "arguably" the first improvement in every city, "especially" on higher levels (p. 132); and delay Granaries at King level or higher until Temples are possible, because fast growth outruns happiness (p. 126). Its terrain advice points the same way: Plains cities grow a little slower than Grassland ones, which keeps unhappiness away "a little longer", "a real boon on the higher difficulty levels" (p. 24).

26:09 Martial law carries the early game. Under Despotism, Monarchy and Communism each military unit with attack 1 or more makes one unhappy citizen content, up to 2, 3 and 4 units per city (2001 manual, pp. 118, 127-130). Prima (p. 40) calls it "especially important when playing at the higher difficulty levels", but warns that cities kept calm by a garrison riot when you move to a Republic or Democracy, so build Temples and wonders before switching. Prima (p. 59) adds that running a Democracy is "one of the most difficult tasks in the game, especially on high difficulty levels". See Happiness and War Weariness.

Luxuries and happiness wonders matter more the higher you play. Each connected luxury makes one content citizen happy in every connected city (Complete manual, p. 86). Prima (pp. 140-145) says the Hanging Gardens' importance "increases with the game difficulty level", calls the Oracle (it doubles Temples) most useful on higher levels, and names JS Bach's Cathedral and the Sistine Chapel for the later ages. Religious civilizations build Temples and Cathedrals more cheaply. All wonders are on Wonders.

Trade with an AI that trades with itself

3:24 The top-level AI trades advances among its own members, and Soren Johnson has described why. In a 2022 talk reported by PC Gamer (Mar 24, 2022), he said the AIs offered each new advance to "friends, rivals, even enemies", which looked like "a giant tech cartel", and that players soon complained the AIs "all started to have the same techs". On his own site he wrote that "the AIs were just playing optimally; the problem was that the rules were bad" (Designer Notes, Oct 8, 2021).

The sources' trading advice follows from that. Prima (pp. 70-71) says to sell your world map when you first meet a civilization, when it is worth most; to pay for advances with maps, luxuries or gold rather than other advances when you can; to treat peaceful advances such as Pottery and Alphabet as safe trades and military ones such as Chivalry and Gunpowder as dangerous; and to read the Foreign Advisor, who says plainly whether a deal will be accepted. Johnson's own remark is that a human player has every reason to add "one more gold piece" until the AI's maximum price is reached. The Great Library, which gives any advance known by two other known civilizations, is most useful "if you find yourself way behind your opponents in research" (Prima, p. 138). More on Diplomacy.

A higher Culture total helps every negotiation. Your rivals' view of you runs from "In awe" (three times their culture) to "Disdainful" (a third), and leaders who respect your culture accept deals more readily (Prima, p. 64).

Claim land early

4:00 The AI's faster building means its Settlers arrive sooner, so the early land race is shorter on Deity than on Prince. The opening that the Complete manual and Prima set out, defense first, then Settlers and Workers, is the same at every level, but the margin for a slow start is smaller; it is on Early Game Strategy. Corruption also rises with the level, so far cities give back less, and Courthouses and an early Forbidden Palace (8 cities) matter sooner (Prima, pp. 15, 60, 138).

Close the gaps in your land before an AI Settler does. Prima (pp. 179-180) advises watching any rival Settler that enters your territory under a right of passage, blocking the roads to its likely site with fortified units, or rushing your own Settler there first. Placement rules are on City Placement and Expansion.

Fight early, and pick the fight

9:20 An AI that out-builds you gets harder to attack with every turn, which is why Prima's conquest advice starts early. Prima (p. 183) says to "seek out your neighbors early" and "take out your weakest enemies before their empires have time to spread", to fight from Monarchy or Communism, which have no war weariness (pp. 57-58), and to build happiness improvements to carry the war. It also warns against an early attack on the Greeks, whose Hoplites "are more than capable of dealing with whatever you throw at them early on" (p. 168).

Your unique unit and your strategic resources decide when an early war can work. Each civilization's unique unit is strongest in its own era, and its first win usually starts your golden age (Firaxis, 2001). Captured cities also capture the AI's Workers and gold (Complete manual, p. 74), which makes up some of the AI's head start. How to run the campaign is on War Guide.

On Deity your units get no help against barbarians, so treat them as a real army. Prima (pp. 177-178) advises finding the encampment as soon as raids begin and destroying it, which also pays gold.

Setup choices that change the challenge

The setup screen can make a top level harder or easier without changing it. Conquests added "Adjustable AI Aggressiveness" and "Game Limits", and Play the World added "Preserve Random Seed", which keeps reloading from changing combat results, and "Allow for Cultural Conversions", on by default (Complete manual, pp. 32-33). Johnson wrote that the random seed was saved because some fans "felt that the game was cheating" when reloads changed results (Designer Notes, Jun 12, 2011). Prima (p. 8) notes that small worlds bring rivals into contact early and usually end in war, while large ones give more time to expand. Every option is on Game Setup and Maps.

Frequently asked questions

What is the hardest difficulty in Civ 3? Sid, added by the Conquests expansion with Demigod. The Civilization 3 Complete manual calls it "the most punishing AI difficulty level ever seen in Civilization"; Deity is the level below it.

What does Deity change in Civ 3? In Prima's 2001 table for Civilization 3, Deity gives each city one content citizen, lets the AI build and research in 60 percent of your time, removes your combat bonus against barbarians and raises corruption. Rivals also negotiate harder and break treaties more often.

How do I beat Deity in Civ 3? The official Civilization 3 sources point to four things: build Temples and use martial law before letting cities grow, trade maps and luxuries rather than advances, claim land fast, and attack your weakest neighbor early from Monarchy. No official source gives a guaranteed method.

Does the AI cheat on Deity in Civ 3? The Civilization 3 AI on Deity builds and researches faster than you by rule (60 percent of your time, per Prima's guide), and its leaders are craftier. No manual or guide read lists extra units for it; Suede's video shows the AI starting with extra defensive units, Settlers and Workers on levels above Regent.

What is the difference between Demigod and Deity in Civ 3? Demigod, added by Conquests, sits between Emperor and Deity; the Civilization 3 Complete manual describes it as for players not "quite ready for the ultimate Civ challenge". No source read gives its exact numbers.

What government should I use on Deity in Civ 3? Prima's Civilization 3 guide recommends Monarchy for war and the Republic for peaceful play, but warns that running a Democracy is one of the hardest tasks in the game on high levels. Martial law under Despotism, Monarchy and Communism is a key happiness tool at the top.

Sources

• Sid Meier's Civilization III Complete manual, 2K Games and Firaxis Games, 2005 (read Oct 22, 2026)
• Civilization III manual, First Edition, Infogrames and Firaxis Games, Sep 2001 (read Oct 22, 2026)
• Sid Meier's Civilization III: Prima's Official Strategy Guide (David Ellis), Prima Games, 2001 (read Oct 22, 2026)
• Developer Update: Civ-Specific Abilities (Dan Magaha), Firaxis Games (civ3.com, archived), 2001
• Civilization III: Conquests Review (Jason Ocampo), GameSpot, Nov 18, 2003
• Soren Johnson says Civ 3's bargaining table was a 'big mistake' (Tyler Wilde), PC Gamer, Mar 24, 2022
• Old World Designer Notes #10: Diplomacy (Soren Johnson), Designer Notes, Oct 8, 2021
• GD Column 17: Water Finds a Crack (Soren Johnson), Designer Notes, Jun 12, 2011
• Explaining The Difficulty Levels Of Civ 3, Suede, Jul 27, 2019 (video)
• Civ 3's Hardest Difficulty Done Right, Suede, May 28, 2024 (video)