WordPress Plugin for adding multiple post type?

Is there a plugin to assing multiple type to a post?

You should probably work with Multi-sites (Plugin and configuration at the original WordPress website) - let say you want to combine a games plugin, which makes games of every post and a normal blog. Then you can integrate two different types of posts. You only got the WordPress system installed on your web server, but you get different kind of tables in your database like WP_ and WP2_.