VIDEO GAME REVIEWS:  quot;Halo 2 quot; a worthy sequel that mostly lives up &lt;b&gt;...&lt;/b&gt; Even if you don #39;t play video games, chances are you #39;ve heard about  quot;Halo 2. quot;. Microsoft Corp. made sure of that with a massive PR blitz, boldly proclaiming  quot;there hasn #39;t been this much anticipation 