Sid Meier, designer of Civilization, and Brian Reynolds, designer of Civilization II, developed Alpha Centauri after they left MicroProse to join with Jeff Briggs in creating a new video game developer: Firaxis Games. Electronic Arts released both Alpha Centauri and its expansion, Sid Meier's Alien Crossfire, in 1999. The following year, Aspyr Media ported both titles to Classic Mac OS while Loki Software ported them to Linux.
SId mEIEr, dEsigner of CiviLizatIoN, and brian reYNoLdS, deSiGneR OF civilIZatIon ii, DEvelOpED aLpHa CentAUri afTer theY LEfT miCroprose to joiN with jeFf BrIggs in creating a NEW videO gaMe devELoper: FiRaXis gAmes. eLeCTRoNic ARtS RElEasED boTh aLPha centAuri aND Its eXPansIoN, sID meIer'S alien CrossfiRe, in 1999 the followIng yEAr, asPyr MeDia poRTed both titles to cLasSIc mAc os whiLe lokI sofTwARE PoRtEd thEm to lInux.