Upon completion, the team felt that "Alien Crossfire" was somewhere between an expansion and a full-blown sequel. In the months leading to the release of "Alien Crossfire", multimedia producer Michael Ely wrote the 9 episodes of "Centauri: Arrival", introducing the "Alien Crossfire" factions. The game initially had a single production run. Electronic Arts bundled "Alpha Centauri" and "Alien Crossfire" in the "Alpha Centauri Planetary Pack" in 2000 and included both games in "The Laptop Collection" in 2003. In 2000, both "Alpha Centauri" and "Alien Crossfire" were ported to Classic Mac OS by Aspyr Media and to Linux by Loki Software.