Microsoft Sees \$100 Million First Day for 'Halo 2'  LOS ANGELES (Reuters) - First-day sales of Microsoft  Corp.'s &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=MSFT.O qtype=sym infotype=info qcat=news"&gt;MSFT.O&lt;/A&gt; new video game "Halo 2" will reach \$100  million, a senior Microsoft games executive said on Tuesday.