Valve Alters Steam Strategy as Xbox Plans Proceed, PC Focus Shifts

I can’t write the Halo Campaign Evolved news article from the provided research because the “source material” only contains a heading and no actual story details (no release info, patch notes, creators/publishers, dates, features, quotes, or any other facts). To follow your rules—cover every substantive news fact without inventing anything—I need the full text of the article or the missing body content that explains what “Halo Campaign Evolved” includes and what’s new about Master Chief’s return.

Please paste the complete source HTML/text (not just the heading). Once I have it, I’ll produce a single, fully original Planetherbs-style news piece in English with a fresh structure, minimal headings, and only verified facts from your material.