How do I do this?

Your title tag is empty for some reason, it looks like this:

<title> </title>

In the Midnight theme, the header.php file should have a line of code that looks like this:

<title><?php bloginfo('name'); ?> <?php if ( is_single() ) { ?> &raquo; Blog Archive <?php } ?> <?php wp_title(); ?></title>

You could change your code in the header to get the title you want:

<title>Halo 3: ODST News and Information</title>