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A month after Sid Meier's Alpha Centauri's February 1999 release, the Firaxis team began work on the expansion pack, Sid Meier's Alien Crossfire (SMAX). Alien Crossfire features seven new factions (two that are non-human), new technologies, new facilities, new secret projects, new alien life forms, new unit special abilities, new victory conditions (including the new "Progenitor Victory") and several additional concepts and strategies. The development team included Train as producer and designer, Chris Pine as programmer, Jerome Atherholt and Greg Foertschand as artist, and Doug Kaufman as co-designer and game balancer. The team considered several ideas, including a return to a post-apocalyptic earth and the conquest of another planet in the Alpha Centauri system, before deciding to keep the new title on Planet. The premise allowed them to mix and match old and new characters and delve into the mysteries of the monoliths and alien artifacts. The backstory evolved quickly, and the main conflict centered on the return of the original alien inhabitants. The idea of humans inadvertently caught up in an off-world civil war focused the story.
Train wanted to improve the "build" aspects, feeling that the god-game genre had always been heavily slanted towards the "Conquer" end of the spectrum. He wanted to provide "builders" with the tools to construct an empire in the face of heated competition. The internet community provided "invaluable" feedback. The first "call for features" was posted around April 1999 and produced the Fletchette Defense System, Algorithmic Enhancement, and The Nethack Terminus. The team had several goals: factions should not be "locked-in" to certain strategies; players should have interesting things to do without unbalancing the game, and the factions must be fun to play. The team believed the "coolness" of the Progenitor aliens would determine the success or failure of Sid Meier's Alien Crossfire. They strove to make them feel significantly different to play, but still compatible with the existing game mechanics. The developers eventually provided the aliens with Battle Ogres, a Planetary survey, non-blind research, and other powers to produce "a nasty and potent race that would take the combined might of humanity to bring them down." Chris Pine modified the AI to account for the additions. The team also used artwork, sound effects, music, and diplomatic text to set the aliens apart. Other than the aliens, the Pirates proved to be the toughest faction to balance because their ocean start gave them huge advantages.
Upon completion, the team felt that Sid Meier's Alien Crossfire was somewhere between an expansion and a full-blown sequel. In the months leading to the release of Sid Meier's Alien Crossfire, multimedia producer Michael Ely wrote the nine episodes of Centauri: Arrival, introducing the Sid Meier's Alien Crossfire factions. The game initially had a single production run. Electronic Arts bundled Sid Meier's Alpha Centauri and Sid Meier's Alien Crossfire in the Alpha Centauri Planetary Pack in 2000 and included both games in The Laptop Collection in 2003. In 2000, both Sid Meier's Alpha Centauri and Sid Meier's Alien Crossfire were ported to macOS by Aspyr Media and to GNU/Linux by Loki Software.
Minimum & Recommended Specifications
|Microsoft Windows Minimum Specifications|
|CPU||Pentium 133 MHz|
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- Train (1999-08-25), p.45.
- Train (1999-08-25), p.46.
- Train (1999-08-25), pp.47-8.
- Train (1999-08-25), p.47.
- Train (1999-08-25), p.48.
- Sid Meier's Alpha Centauri Planetary Pack. Moby Games.
- The Laptop Collection. Moby Games.
- Sid Meier's Alpha Centauri. Insidemacgames.com (2000-06-09). Retrieved on 2010-08-07
- Shah, Rawn (2000-08-24). "Review: Alpha Centauri for Linux". Archives.cnn.com. http://archives.cnn.com/2000/TECH/computing/08/24/linux.civ.review.idg/index.html. Retrieved 2010-08-07.