0 A.D. (pronounced "zero ey-dee") is a free, open-source, cross-platform real-time strategy (RTS) game of ancient warfare. It's a historically-based war/economy game that allows players to relive or rewrite the history of twelve ancient civilizations, each depicted at their peak of economic growth and military prowess.

The twelve factions are: Three of the Hellenic States (Athens, Sparta and Macedonia), two of the kingdoms of Alexander the Great's successors (Seleucids and Ptolemaic Egyptians), two Celtic tribes (Britons and Gauls), the Republican Romans, the Achaemenid Persians, the Iberians, the Carthaginians, and the Mauryan Indians. Each civilization is complete with substantially unique artwork, technologies and civilization bonuses.

Developed using Pyrogenesis, a game engine custom-built to suit our needs, 0 A.D. will give players a rich and entertaining real-time gaming experience. 0 A.D. is portable, running not only on Windows, like most games, but also on Linux and Mac OS X.

We believe free, OS software like 0 A.D. encourages sharing, learning and creativity. That's why we have made the code and data available under the GPL license, and released the art, sound and documentation under CC-BY-SA. Modifying the game's data files is as simple as editing JavaScript and XML files, so anyone can learn how the game was developed and share their own contribution to the 0 A.D. world.

0 A.D. is being developed by Wildfire Games, a community of volunteer, hobbyist game developers from all over the world. 0 A.D. has been an open source project since July 2009. We're looking for programmers, 3d artists and more.

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Wildfire Games, an international group of volunteer game developers, proudly announces the release of 0 A.D. Alpha 21 “Ulysses”, the twenty-first alpha version of 0 A.D., a free, open-source game of ancient warfare. This alpha features new game modes, plenty of new maps, the official introduction of the final civilization: The Seleucid Empire and more!

Easy Download and Install

Download and installation instructions are available for Windows, Linux and Mac OS X. 0 A.D. is free of charge and always will be. Although you might find some people selling copies of 0 A.D., either over the internet or on physical media, you will always have the option to download 0 A.D. completely gratis, directly from the developers.

How to Download 0 A.D.

Instructions for Windows

Instructions for Linux

Instructions for OS X

Moreover, you can redistribute the game and modify it freely as long as you abide by the GPL. You can even use parts of the art and sound for your own projects as long as you abide by CC BY-SA. No “freemium” model, no in-game advertising, no catch.

Top New Gameplay Features In This Release

  • Herocide/Regicide: You start with a hero and are defeated when he or she dies.
  • Wonder Victory: Now you can change the time from when the wonder is built to when you win. Either set it to 0 so you win as soon as the wonder is built or to anywhere between 1 and 120 minutes for a chance for the opponents to destroy it before the match is won.
  • Last Man Standing: Only one player can win the game. Form temporary alliances to eliminate common competitors. But be careful: as the remaining players struggle for victory, allies are forced to turn against you. This mode can be played with every victory condition.
  • New buildings and champions
    • The Persian Hall and Hellenic Royal Stoa can train new Infantry Champions in town and city phase.
    • The Briton Crannog acts as a civic center and dock, providing economic stability on both land and water.
    • Romans and Persians benefit from the new Temple of Vesta and Gate of Ishtar, making buildings harder to capture.


The Temple of Vesta, Thureophoros and the Crannog

  • Patrolling: When clicking the button or pressing the hotkey (P + Right Click), units move along the path you set for them and attack enemy units they encounter along the way, then return to the beginning and continue doing so until you give them another order.
  • Tech Cost Modifiers and Team Bonuses: The costs of technologies can now be modified by Auras and Technologies, demonstrated by faster and cheaper research when a Library was built. Players get a bonus if they are on a team with a player of a certain civilization. For example allies of Iberians have 20% cheaper skirmishers, allies of Seleucids have 20% cheaper civic centers.
  • Stackable Auras: Capturing further Wonders, Libraries or Theatrons increases the building bonus proportionally. Losing a wonder means losing the population bonus, capturing a wonder means further increasing the maximum population, making the Wonder a crucial part of the empire.
  • New Balancing: The aim of the new balancing is to stop players from destroying buildings with infantry and cavalry, enforce the use of siege engines, reduce the spamming of champions by making them more expensive and slower to train. With the addition of town phase champions and the lessening of attack damage of defensive buildings, early attacks are more feasible. Capturing of buildings is only feasible if they are heavily damaged or left unguarded. More details are found in the Balancing section of the changelog.

Upgrading System:

Buildings and units can now be upgraded. For example the new Sentry Towers can be upgraded to Defense Towers.

Sentry Towers

New Maps

Alpha 21 adds no less than eleven random map scripts and two skirmish maps.

Nine of these random maps teleport players to actual geographical regions: Amazon, Mediterranean, Red Sea, Marmara, Pompeii , Bahrain, Howe Sound, Ngorongoro and Rouen.


The Mediterranean




Red Sea


Howe Sound

On the random map Caledonian Meadows, wide grasslands, deep forests and seas lie between opposing teams which are yet connected by paths. The map demonstrates realistic terrain generation, distributing resources by height.


Caledonian Meadows

The Skirmish map Dueling Cliffs uses the new height limit, that was introduced in Alpha 19:


Dueling Cliffs

New Models

The Seleucid faction was completed by adding the models for the Colonnade, Barracks, Wonder, Market, Corral, Blacksmith, Dock, Library, Military Colony and City Walls.


Seleucid buildings (from the top left): Walls, Wonder, Market,

Military Colony, Blacksmith, Corral, Library, and the Dock

New Fields and Oak trees beautify the landscape. The Gaul Fortress, Tavern and the Ptolemaic Military Colony received new models as well.


New fields, the Gaul Fortress, taverns on the left and right,

and Sentry Towers, Defense Towers, and the new oak trees in the background.

User Interface

The new Objectives dialog reveals the chosen matchsettings in running games:


Objectives Dialog

New Tooltips lift some secrets, like the loot that attackers are rewarded with when killing enemy units or destroying their buildings, the garrisoning- and arrow limit of buildings, healing statistics and assigned hotkeys:


Loot Tooltips

Resources of allies are now visible in the tooltip of the top panel and in the summary screen after having researched cartography:


Allied Resource Tooltips

Finally a Multiplayer Pause Screen indicates who took a break:


Pause Screen

An in-game chat history dialog and acoustical chat notifications ease communication:


Chat History

More Multiplayer Lobby Match Details help to coordinate upcoming matches:

Multiplayer Lobby Match Details

Under the hood

  • The Javascript engine was updated to Spider Monkey 38.
  • Windows binaries can now use more than 2GB of RAM, which should fix crashing on Windows.
  • The game now supports hosting on arbitrary UDP ports, which can be useful if your ISP blocks the default port.

And many more smaller additions and bug fixes, if you want to read a more detailed list see the full Alpha 21 Changelog.

Getting Support

Please see the “Get Support” page on our website to find ways to get help from the active and friendly 0 A.D. community.

We are well aware there is some room for improvement in 0 A.D. Some known issues are: Lag, visual glitches or textures not loaded, missing animations and more. When you provide feedback, we would ask you to focus on some of the other points that could be improved. Thanks.

Please Contribute!

We are seeking volunteer contributors in programming, art, sound, documentation and more. Programmers are especially welcome and can get started immediately.

Interested? Log onto #0ad-dev on QuakeNet on IRC and meet the developers. Also, you are invited to register on our forums and start participating!

Why “Ulysses”?

We name our releases according to development status (“Alpha” or “Beta”), successive release number (1, 2, 3, …) and a word relating to the ancient world, in alphabetical order (“Argonaut” for A, “Bellerophon” for B, …).

“Ulysses” is the Latinized name for the Greek mythological figure Odysseus. This name is relevant for the release because we added the Herocide game mode, and Odysseus is one of the most well known heroes of all time.

For the next alpha, we welcome fan suggestions for words relating to the ancient world beginning with the letter V. Keep it original and related to the time frame portrayed in 0 A.D. (appx. 500 BC – 1 BC)!

Subscribe to 0 A.D. Development News

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Contact info for press, bloggers, etc.: aviv@wildfireTROYgames.com without the capitalized name of a city Ulysses spent some time in.

November News from Wildfire Games

November News from Wildfire Games

News 6 comments

0 A.D. has a new Project Leader, was presented at an event in Toulouse, and is well on its way to have the new unit models implemented. Read about these...

Cen 21 now available!

Cen 21 now available!

Millennium A.D. 2 comments

Cen can be translated as "Torch". The torch is known to every living man by its pale, bright flame; it always burns where princes sit within. New skirmish...

0 A.D. Delenda Est released for Alpha 21

0 A.D. Delenda Est released for Alpha 21

0 A.D. Delenda Est 12 comments

The Delenda Est mod has been released for 0 A.D. Alpha 21 Ulysses. Download it today right here on Moddb.

Battalions and Formations

Battalions and Formations

0 A.D. Delenda Est 14 comments

If official release of the game does not include battalions and formations, then this is how Delenda Est would attempt to include battalions and formations...

RSS Related Files
Cen 21

Cen 21

Millennium A.D. Full Version 3 comments

Cen word can be translated as "Torch". The torch is known to every living man by its pale, bright flame; it always burns where princes sit within. New...

Rise of the East 21

Rise of the East 21

0 A.D. Rise of the East Full Version 9 comments

Rise of the East is updated to the 0 A.D. Alpha 21 release. Some fixes were applied thanks to our great testers!

Delenda Est - Alpha 21 release

Delenda Est - Alpha 21 release

0 A.D. Delenda Est Demo 28 comments

Delenda Est is now available to try for 0 A.D. Empires Ascendant Alpha 21.

0 A.D. Alpha 21 Ulysses - Mac Version

0 A.D. Alpha 21 Ulysses - Mac Version

Full Version 1 comment

This alpha features new game modes, plenty of new maps, the official introduction of the final civilization: The Seleucid Empire and more!

0 A.D. Alpha 21 Ulysses - Windows Version

0 A.D. Alpha 21 Ulysses - Windows Version

Full Version 11 comments

This alpha features new game modes, plenty of new maps, the official introduction of the final civilization: The Seleucid Empire and more!

300 Mini Mod Release 1.0

300 Mini Mod Release 1.0

300 Mini Mod Full Version 6 comments

This is the first (and probably only) release of my mini-mod regarding 300 Spartans in 0 A.D. To install simply unpack the archive in the mods folder...

Comments  (0 - 10 of 773)

it feels like the Age of empires 3 but have it's own unique it is.

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6 months!!! where is 22!

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Hey is the farm grounds working? cause if I build farms there I still gathering really slow

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Building farm grounds don't give food. You need to work on them.

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any news on the faction late rome or early eastern roman empire (byzantine empire)? would so love a late rome in an rts game!

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feneur Creator

The game has been split up into two parts (one for 500 B.C. - 1 B.C. and two for A.D. 1 - A.D. 500), and the factions for the second part has not been decided. Late Rome/Byzantines are very likely to appear in one way of another though.

Reply Good karma+1 vote

You can get news on Roman Empire 2000 years back​. It doesn't exist nowadays. So there's no news.

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Lo que le hace falta a este juego es la asignación de las unidades a un héroe, al estilo Imperium 3, entonces seria un juegazo porque no tendrías que ir seleccionando tan específicamente, solo al héroe y mueves el ejercito, ademas de crear formaciones cerradas mas estratégico que llevar a un montón de soldados como si fuesen cabras, seria la combinación perfecta entre AOE e IMPERIUM.
Ademas de habilidades y niveles para el Héroe, seria en general lo militar mas táctico y mas fácil de llevar, centrándote en la diversión y mejor control de tus soldados.
Si hubiese alguien que pueda llevar esta información a los creadores les estaría muy agradecido, gracias.

Reply Good karma Bad karma+2 votes

Totalmente de acuerdo contigo. Es un gran juego pero le falta algunas cosas para ser perfecto, entre otras cosas, esto que comentas.
A mi también me gustaría que el juego se centre más en lo militar y que los héroes jueguen un papel más importante durante la partida.

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RT @Softpedia: 0 A.D. Alpha 21 "Ulysses" Open-Source Game of #Ancient #Warfare Adds New Features Buff.ly @play0adT.co

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RT @AliceKlipper: @play0ad > Alpha 21 Ulysses You did it wrong; you should use this name for version 31, that might be a good referen… T.co

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0 A.D. Alpha 21 Ulysses is out, featuring new game modes, new maps, a finished Seleucid faction, bugfixes, and more! Play0ad.com

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