Let me display 10 articles from "featured" category. Just the first must have title and excerpt, the relaxation 9 only game titles. How'd I actually do that?

Thank you for the help.

When you're looping with the posts, just see if current $post informed is the first within the return in the get_posts function:

<?php
	$featured = get_posts('numberposts=10&category_name=featured'); // Your original query

	foreach($featured as $post):
		$first = ($post == $featured[0]);
		setup_postdata( $post );

		if($first): ?>

		<div class="post main-featured">
			<h2><?php the_title(); ?></h2>
			<p><?php the_excerpt(); ?></p>
		</div>

		<?php else: ?>

		<div class="post featured">
			<h2><?php the_title(); ?></h2>
		</div>

		<?php endif;		
	endforeach;
?>