A month after "Alpha Centauri"s February 1999 release, the Firaxis team began work on the expansion pack, "Sid Meier's Alien Crossfire". "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 Foertsch as artists, and Doug Kaufman as co-designer and game balancer.