Freeciv is an open source project that aims to provide a free Civilization clone (released under the GPL).
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WHAT´S CHANGED SINCE 2.2
Increased number of simultaneous players - from 30 to 126
Increased maximum map size - from 30.000 tiles to 128.000 tiles
More than doubled the number of playable nations (from 187 to 387). Many improvements to existing nations, such as using native spellings for cities and leaders.
Update of the help texts
Variable city radius (radii between 1 and 5 possible)
Tech upkeep (similar to gold upkeep for improvements)
Reworked settings configuration
Lua improvements
New save game format (old save games can still be loaded)
New save file names (defaults to something like freeciv-T0010-Y-3500-manual)
New rulesets (experimental and multiplayer)
Cleanup of the dialogs in the gtk client
Split AI code into the real AI and advisors code