Ordering posts by custom fields

good day, quick question, I have a site that pulls posts from certain category, basically the code to see how I call those posts is as follows:

<div class="jumbotron">
<h2>Ultimos Estrenos Nintendo Wii</h2>
<?php query_posts('cat=99&order=DSC&showposts=11&paged='.get_query_var('paged')); ?>
<?php if (have_posts()) :  ?>
<?php while (have_posts()) : the_post(); ?>
<a href="<?php echo get_permalink(); ?>"><?php the_post_thumbnail( 'thumb-small' ); ?></a>
<?php endwhile; ?>
<?php else: ?>
<p><?php _e('No posts were found. Sorry!'); ?></p>
<?php endif; ?></p>
<br /><br />
<a href="https://bluegames.com.ve/category/nintendo-wii/" class="btn btn-xs btn-warning">VER TODOS LOS ESTRENOS</a>
</div>

As you can see I’m using order=DSC to order posts but the client has a custom field that is a code, they want to order those posts using that custom field, but I’m not sure how to achieve that, I call that custom field using this:

<?php echo get_post_meta($post->ID, 'Codigo de Pelicula', true); ?>

But I don’t know how to order those posts using that custom field, so, asking, someone with that kind of past experience that can help with?