According to a report on MacAddict, MacHalf-Life, as well as future simultaneous Mac/PC releases from Valve have been announced, though if the report is accurate, it seems odd not to have seen it elsewhere already. What they say is: "Half-Life marks Sierra's return to the Mac platform in a big way. The company has committed to making all of its upcoming titles cross-platform, and it's also shooting for simultaneous PC/Mac release dates. Expect to see Half-Life arrive this fall." Thanks Seb.