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''Freeciv'' is a single, and multiplayer, turn-based strategy game for workstations and personal computers inspired by the proprietary ''Sid Meier's Civilization'' series. It is available for most desktop computer operating systems. Released under the GNU General Public License, Freeciv is free and open source software. The game's default settings are closest to ''Civilization II'', in both gameplay and graphics (including the units and the isometric grid). Players take the role of tribal leaders in 4000 B.C. who must guide their peoples through the centuries. Over time, new technologies are discovered, which allow the construction of new city buildings and the deployment of new units. Players can wage war on one another or form diplomatic relationships. The game ends when one civilization has eradicated all others or accomplished the goal of space colonization, or at a given deadline. If more than one civilization remains at the deadline, the player with the highest score wins. Points are awarded for the size of a civilization, its wealth, and cultural and scientific advances. == History == At the computer science department at Aarhus University, three students, avid players of XPilot and of Sid Meier's ''Civilization'', which was a stand-alone PC game for MS-DOS, decided to find out whether the two could be fused into an X-based multiplayer Civilization-like strategy game. The students—Peter Unold, Claus Leth Gregersen and Allan Ove Kjeldbjerg—started development in November 1995; the first playable version was released in January 1996, with bugfixing and small enhancements until April. The rules of the game were close to Civilization, while the client/server architecture was basically that of XPilot. For the developers, Freeciv 1.0 was a successful proof of concept, but a rather boring game, so they went back to XPilot. But Freeciv was already playable and addictive enough to pick up other students as players, bugfixers and feature extenders. It was useful enough to be picked up by popular Linux distributions, e.g. Debian.〔(【引用サイトリンク】title=the Debian change log for Freeciv )〕 Designed to be portable, it was ported to many platforms, which helped its survival. In 1998, computer players were added that could soon beat newcomers to the game with ease, using only minor forms of cheating. The game grew in popularity. A public server was installed that hosted games permanently, archiving them and publishing a post-game analysis webpage including per-player statistics and an animated map replay.〔(【引用サイトリンク】 title=Pubserver )〕〔(【引用サイトリンク】 title=old snapshots of civserver.freeciv.org (archive.org Wayback Machine) )〕〔(【引用サイトリンク】 title=old snapshots of pubserver.freeciv.org archive (archive.org Wayback Machine) )〕 Subsequent 1.x releases improved the GUI, improved the gameplay, and added many small features, without causing a major change to how the game was best played. Incessant city building turned out to be a critical success factor; developing larger cities did not appear worthwhile. As many regular players reached excellent gaming skills, diplomacy became essential, so team games slowly started to replace free-for-all games from around 2002. Version 2.0, released in 2005, changed the game significantly: by modifying various costs and benefits and adding some new game elements it made it worthwhile for players to develop only a few large cities, full trade routes, and advanced technologies. This necessitated a distinct phase of rapturing under relatively peaceful conditions; hence, games were almost always played in teams and typically took longer to finish when compared to 1.x games. In 2006 TCP and UDP port number 5556 was assigned to Freeciv by IANA. Freeciv is described as an example in The Art of Unix Programming. Some studies and courses use Freeciv as a platform for experimenting with the design and programming of intelligent agents.〔(【引用サイトリンク】 title= CSE 590AG: Applications of Artificial Intelligence )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Freeciv」の詳細全文を読む スポンサード リンク
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