Multiplayer

0:00 Civilization 3 had no multiplayer when it shipped on Oct 30, 2001: GameSpot's preview of Oct 18, 2001 said the release would have none "in any form". The first expansion, Play the World, added it on Oct 29, 2002 with "Five multiplayer game variations": Internet, local network (LAN), Hot Seat and Play by E-Mail games, with turn-based, simultaneous and a new "Turnless" mode, per the Play the World manual (p. 6). Internet games ran through GameSpy until that service closed in 2014; since 2K's Steam update of Mar 16, 2015 they run through Steam, identically except that the "Direct IP" option is gone. Every copy sold today, the Complete edition on Steam and GOG, includes Play the World and Conquests, so every copy has the multiplayer menu.

Quick facts

Source: Play the World manual, pp. 6, 26-28 and 32-41; Civilization III Complete manual, pp. 179-197; 2K on Steam, Mar 16, 2015; Macworld, Nov 30, 2005.

Why the game shipped without it

Multiplayer was cut late in development. GameSpot's 2001 review reported that "as the game neared completion, Firaxis decided not to ship with multiplayer support." Jeff Briggs, the lead designer, later told PC Gamer that it "wasn't ready for launch" and that waiting for it would have delayed the game by a year. See Jeff Briggs.

Connections: Internet, LAN, Hot Seat and e-mail

The Multiplayer button on the main menu offers four connections, per the Complete manual (p. 182): Internet ("compete with other fans across the world"), LAN ("friends on your home network"), Hot Seat ("in the comfort of your home") and Play by E-Mail ("a turn-based game without time constraints"). Internet and LAN games need a network connection; e-mail games need only e-mail accounts, and Hot Seat games need no connection at all (p. 179).

A game holds up to eight players, counting the host. The host can close slots, fill them with computer players and boot players before the start, per the Complete manual (p. 186). Players pick their civilizations on the setup screen, and none can take a civilization another player already chose, so the manual advises picking fast. The rest of the setup matches a single-player game; see Game Setup and Maps.

Leaving costs everything. When a player quits a multiplayer game, "your civilization is eliminated from the game and all of your cities are destroyed", per the Complete manual (p. 190).

Game types: turn-based, simultaneous and turnless

A Turn-Based game plays like single-player, one civilization at a time, with an optional turn timer. While others move you can still set city production and consult advisors, but you cannot move units, assign unit actions or hurry production, per the Complete manual (pp. 190-191). GameSpot's Play the World review praised that "you can manage your empire even when it's not your turn".

In Simultaneous Movement everyone moves at once. Each turn lasts until the turn timer runs out, and production and research are processed before the next turn begins (Complete manual, p. 191). The host's Game Speed (Slow, Medium or Fast) sets the timer, and choosing None gives unlimited time; the game lengthens the time as civilizations grow (pp. 185 and 195).

Turnless was new to the series in Play the World. Instead of turns, food, shields, commerce, research and upkeep are processed at the end of timed "faction upkeep" phases that grow longer as the game goes on, and the game never pauses to announce them, per the Play the World manual (p. 38). Firaxis's Jeff Morris explained in a 2002 developer update that each unit and city keeps its own clock, so no single player can hold up the game. GameSpot's reviewer found the mode a poor fit for Civilization's pacing.

Conquests changed the list. The Complete manual (pp. 183-188) names the lobby's game types as Tournament, Simultaneous Moves and Turn-Based, without Turnless, yet keeps the sentence about "four new game modes specifically designed for multiplayer play" (p. 190) and does not describe Tournament further.

Victory conditions for shorter games

12:06 Play the World added victory conditions meant to "allow for shorter games", which can be switched on for single-player or multiplayer games, per the Play the World manual (pp. 26-28):

• Elimination: lose any city and your whole civilization is out; the last one standing wins.
• Regicide: every civilization starts with a "king" unit, its Great Leader (Abraham Lincoln for the Americans); when the king dies, the civilization is out.
• Mass Regicide: several kings each; you are out when all are killed.
• Victory Point Locations: each civilization's starting square is a location, worth 250 victory points for every turn one of your military units holds it.
• Capture the Princess: each civilization has an immobile princess; carrying a rival's princess to your capital scores 10,000 points, and 10,000 more if her civilization is gone.

2:20 Conquests added Reverse Capture the Flag, in which a "flag" must be returned to a Victory Point Location, per the Complete manual (p. 178). Firaxis's developer update says Elimination and Regicide came from the aim of short multiplayer "meta-games". All of them, with the standard ways to win, are on Victory Conditions.

Hot Seat and Play by E-Mail

Hot Seat puts every player at one computer: it plays "exactly like a Turn-Based game except that all players play on the same computer", with no turn timer, per the Complete manual (p. 191). At the start the host sets an Administrator Password that can drop players, and on the first turn each player may set a password that guards their civilization. A saved Hot Seat game must be loaded from the Multiplayer Setup screen; loaded from the main menu, it plays as a single-player game (p. 192).

Play by E-Mail passes a saved game between players. After each turn the game prompts you to save and exit; you e-mail the file to the next player yourself, since the game "does not save e-mail addresses", and that player copies it into the Saves folder, loads it and takes a turn, per the Complete manual (pp. 192-193). The same passwords apply. Diplomacy works differently in both modes (p. 197): GameSpot found it "drawn out over several turns".

Both modes were in Play the World, not added later: its manual (pp. 6 and 38-40) lists Hot Seat and Play by E-Mail among the new features. GameSpot's review found them disappointing because there is "no replay of the other players' turns": a unit lost while you are away simply vanishes. The fan patch C3X lists an option to replay AI moves for all human players in Hot Seat (C3X README).

The GameSpy years

Internet games ran through GameSpy, "a free Internet game portal", per the Complete manual (p. 179). Hosting behind a firewall meant opening a list of ports, among them 6073 for the first UDP connection and 2302 to 2400 for later traffic, and the manual warns that only one player behind a firewall can be in a game (pp. 180-181).

The online launch went badly. GameSpot's Tom Chick called Play the World's multiplayer "an unmitigated disaster" in his review of Nov 9, 2002: online lag was "intolerable" even in turn-based modes, games with more than two players crashed often, and the best way to play was on a LAN. GameSpot scored the expansion 5. The PTW v1.27f patch of Mar 3, 2003 targeted "online matchmaking, unit movement delays, player exploits, and out of sync errors", per the official support page; the patches are listed on Patches and Updates.

Conquests is where reviewers found it working. GameSpot's Jason Ocampo wrote in Nov 2003 that "multiplayer is now playable in a reliable manner...sort of", after a slow succession of patches had fixed most of Play the World's problems.

GameSpy closes, Steam takes over

GameSpy's servers closed on May 31, 2014. 2K named Civilization 3 and its expansions among the games that would move to Steamworks rather than lose online play, as Shacknews reported on Apr 22, 2014.

0:41 The update reached Steam on Mar 16, 2015. 2K's announcement says it "replaces GameSpy with Steam for multiplayer functionality", that the game "functions identically to the previous GameSpy version with the exception that the 'Direct IP' option has been removed", that saves are not affected, and that owners of a disc version could ask 2K support for the update. A second update on Apr 23, 2015 fixed problems the first one caused and removed the in-game Steam overlay. PCGamesN's headline on Mar 18, 2015 was that Civilization 3 "has multiplayer again".

Steam's store text was never updated. The store page still says "Online Multiplayer to be suspended as of May 31st 2014, LAN mode still supported", although 2K's own notices above say online play returned through Steam in 2015. Steam's listing data tags the game Multi-player. No press report since 2015 says whether the Steam lobby still works in 2026.

GOG, Mac and mods

The GOG edition does not use Steam, so it does not have the 2015 Steam lobby. GOG's store page lists only "Single-player" among the features and does not say whether online play works; it does say DirectPlay must be installed on Windows 8 and later. Hot Seat and Play by E-Mail need no online service in any edition (Complete manual, p. 179). Running the game on current systems is covered on Running Civilization 3 Today.

Mac players had their own network. Aspyr's Civilization 3 Complete for Mac (2006) played Internet games "Mac to Mac only" through GameRanger, per Macworld on Jan 4, 2006; no current Mac version is sold.

Mods and online play mix poorly. The C3X README says online multiplayer "is not officially supported": some features work, others (including stack unit commands) do not, and players have reported crashes.

Frequently asked questions

Does Civilization 3 have multiplayer? Yes, but only with the Play the World expansion (Oct 29, 2002) or Conquests, which includes it: the 2001 base game shipped without multiplayer, and the Complete edition sold on Steam and GOG has Internet, LAN, Hot Seat and Play by E-Mail games (Play the World manual, p. 6).

Can you still play Civ 3 online? Yes on Steam: 2K's update of Mar 16, 2015 replaced the closed GameSpy service with Steam for Civilization 3's online games, identical to before except that Direct IP was removed (2K on Steam). The Steam store text saying online play was suspended in 2014 is out of date.

Does Civ 3 have Hot Seat? Yes: Civilization 3's Hot Seat mode, added by Play the World, lets several players take turns on one computer, with an administrator password and optional passwords for each civilization (Complete manual, pp. 191-192).

How does Play by E-Mail work in Civ 3? In Civilization 3, each player takes a turn, saves, and e-mails the saved game to the next player, who copies it into the Saves folder and loads it; the game does not store e-mail addresses (Complete manual, pp. 192-193).

How many players can play Civ 3 multiplayer? A Civilization 3 multiplayer game holds up to eight players, human and computer together, and the host can close slots or fill them with AI (Complete manual, p. 186).

Can you play Civ 3 multiplayer with Direct IP? Not on Steam: Civilization 3's Steam update of Mar 16, 2015 removed the Direct IP option "as it is no longer supported" (2K on Steam).

Sources

• Sid Meier's Civilization III Complete manual (Steam-hosted PDF), 2K Games and Firaxis Games, May 27, 2005
• Civilization III: Play the World manual, Infogrames and Firaxis Games, 2002
• Civilization III Updated Preview (Bruce Grey), GameSpot, Oct 18, 2001
• Civilization III Review (Tom Chick, archived print version), GameSpot, Oct 30, 2001
• Civilization III: Play the World Review (Tom Chick), GameSpot, Nov 9, 2002
• Civilization III: Conquests Review (Jason Ocampo), GameSpot, Nov 18, 2003
• The complete history of Civilization, page 3 (Fraser Brown), PC Gamer, Apr 6, 2020
• Civilization Multiplayer: A Fresh Approach (Jeff Morris, archived), Firaxis Games (civ3.com), 2002
• Civilization III: Support (archived), Infogrames (civ3.com), read Oct 22, 2026
• Borderlands, Civilization 3 & 4 will survive GameSpy shutdown, Shacknews, Apr 22, 2014
• Civilization III Multiplayer Update Now Available, 2K on Steam, Mar 16, 2015
• New update available, 2K on Steam, Apr 23, 2015
• Civilization 3 has multiplayer again thanks to new Steam update (Matt Purslow), PCGamesN, Mar 18, 2015
• Sid Meier's Civilization III Complete store page, Steam, read Oct 22, 2026
• Steam Store API: appdetails 3910, Valve, read Oct 22, 2026
• Sid Meier's Civilization III Complete, GOG, read Oct 22, 2026
• Aspyr accepts Civ III Complete preorders (Peter Cohen), Macworld, Nov 30, 2005
• Aspyr ships Civilization III: Complete (Peter Cohen), Macworld, Jan 4, 2006
• C3X README, maxpetul on GitHub, read Oct 22, 2026
• How To Start Playing Civ 3 Online Multiplayer With The Civplayers Civ3 League, Suede, Nov 30, 2018 (video)
• The overlooked genius of Civilization 3, Suede, Oct 30, 2024 (video)