A thread on the Steam Users' Forums discusses the recent disappearance of the 64-bit version of Half-Life 2, which went missing at the beginning of this month with no explanation. This left users unable to load saved games in progress, and those who contacted Steam support were told the 64-bit version is no longer available and got instructions how to enable cheat codes to get back to the chapter they were playing in the 32-bit version. It took a while for us to get a statement about this from Valve, who now confirm the 64-bit version has been pulled, but do not explain why. They do, however, offer reassurances that it will return, though at this time there is no estimate as to when that will happen.