Here's all the maps I've made for 0 A.D., for your use and enjoyment.
To InstallGo to your 0AD folder, then go binaries -> data -> mods -> public. Then unzip public.zip, go to maps -> scenarios in the new unzipped file structure, and paste 'em there then unzip. You should be able to reach them ingame by selecting "All Maps" under the map filter when starting a game.
On Ubuntu, your 0ad folder will be buried in /usr/share/games/0ad. It won't have the maps/scenarios folders, so open up Nautilus as root (Alt+F2, gksudo nautilus) and enter your password, then navigate to /usr/share/games/0ad/mods/public and create a folder called 'maps' (without quotes) then inside that make one called 'scenarios' (without quotes). Then put your map files in there, and access them the same as above.
Jubal's Maps Pack for A13 Maghada:This contains Barcania II, Colonia, Epidaurum, Nova Isla, and From the Mountains to the Sea in one pack:
Download
Individual maps for Alpha 13:Barcania IIThis stormy-looking island map contains huge potential - a swathe of rugged inland forest cuts off an athenian, a carthaginian, and a briton village. Around the edges of the island, cliffs and coves bring huge potential for sheltered bases and ports, with the starting villages sheltering a few peninsulae or islands accessible only by muddy tracks. Barcania II updated with new factions as above (the original had 2x Hellenes, 1x Celts):
Screenie (spoilered for hugeness, taken on older version though new one is very similar):DownloadColoniaA carthaginian colony is founded on the Celtic/Iberian coast - but the locals aren't going to give up without a fight! Carthage, Celts, and Iberians struggle over a central valley on a resource-rich and rugged map.
Screenie (spoilered for hugeness, taken on older version though new one is very similar):DownloadEpidaurumThe map is actually based on the modern coastline (Cavtat in Croatia) and so bears no relation to Roman/Greek Epidaurum except the name and location basis. Three Greek villages (Macedonian, Athenian, Spartan) in two bays fight it out on the Illyrian coastline for supremacy - both on land and on the water.
Screenie (spoilered for hugeness, taken on older version though new one is very similar):DownloadFrom the Mountains to the SeaA classic multiplayer designed map for one Gaul and one Athenian player. The Greeks start on an island, the Celts in the rugged and wild mountain regions of the map. The vast majority of the resources are clustered along the wide and almost indefensible coast, filled with light forests, marshes, and flat coastal plains. Whichever side controls the resources is more open to assault either from land or sea... the war is about to begin.
Screenie (spoilered for hugeness, taken on older version though new one is very similar):DownloadHimalayaYears after Alexander's retreat, it seemed as if the Macedonians had barely left anything in the Himalayan foothills near India. In fact, some of them had never left... 1v1 Macedon VS Mauryans.
Screenie (spoilered for hugeness, taken on older version though new one is very similar):DownloadNova IslaFor two players; greeks versus celts on an island. includes rough mountainous hills in the west, sweeping woods and grasslands in the east, marshes in the NE, and other such nice features. Pretty fun; a third player is there, for testing purposes mostly, and consists of a few shipwrecked sailors.
Download
Old Maps(For Alphas 4/5: May still work, may not)A4/5 Maps PackThe old Maps Pack; most of these still work OK, just using Celts & Hellenes instead of the newer factions.
DownloadBarcania ISimilar to Barcania II but with Hellene/Hellene/Celt as the factions.
DownloadForests of the StormA battle over thickly forested northern Iberia, with a branched river cutting up a map with heavy forests in the centre and the rugged foothills of the Cantabrian or Asturian mountains around the edges. 1v1 Iberians versus Celts.
Screenie (spoilered for hugeness):DownloadThe Rebels of IposThe Hellenic city of Ipos was doing fine. A good navy, a new sarissa-based army, and powerful walls were all achievements of the new king, Philip (just shoe-horning in some special characters here), and his general Themistocles. However, all was not well. Philip's military success was costing the ordinary people in life and coin, and eventually, while the king was at his palace down the coast hunting, the great orator Xenophon rallied an army of militiamen to attack the city. This is where we start; the countryside has been raised against Themistocles and Philip, who as a result have little access to resources. However, they have by far the more powerful army and have control of the navy still as well, not to mention the city with its fortifications and training centres. As additions there are also celts lurking in the mountains and a Roman force not far away...
Screenie (spoilered for hugeness):DownloadMigrationIn the fens of eastern Britannia, the Romans are invading and pushing tribes from firmer ground to seek refuge in the marshes. As a result, one small settled village, whose only neighbour until lately was the mad old druid at the marsh temple, is about to get more visitors than they bargained for... This map pits two celt groups against one another across a muddy bog; one starts with a base, the other no base but far more people including many horsemen and chariots. A tiny Roman detatchment can be found on one side of the map, and the aforementioned mad druid is in himself the other faction.
Screenie (spoilered for hugeness):DownloadPsychedeliaI don't think this map can be given a normal description. Play it and see.
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