Det var lidt af en bedt for de mange fans, som havde ventet på Halo, da Microsoft købte rettighederne og annoncerede spillet som en eksklusiv Xbox titel.
I weekenden bekræftedes versioner af spillet til både PC og Mac imidlertid alligevel (som ventet).
Microsoft fortæller i sin pressemeddelelse at PC versionen ikke bliver en direkte konvertering af Xbox versionen, men med erfarne Gearbox (Blueshift, Opposing Force) ved rattet loves der masser af ændringer. Disse skulle inkludere både et nyt og PC venligt Multiplayer system og ændringer i Single player delen. Nøjagtigt hvilke ændringer der vil blive foretaget er dog endnu uvist.
Her følger et uddrag fra pressemeddelelsen: :Gearbox president Randy Pitchford is enthusiastic about the potential for Halo on the PC. "We've been dying to play Halo online with a PC ever since its spectacular launch last year," he commented. Gearbox is best known for its work with Valve’s seminal Half-Life, for which it has developed a number of modifications and add-on packs.
The PC version of the game will be published by Microsoft, while publishing duties on the Mac version will be undertaken by Destineer, a company which has previously published other Microsoft titles including Age of Empires II and Links Championship Edition on the Mac.