I found a trick and I want to tell it here.
I was looking for a solution (free or paid) to sort my pre-order games by release date.
I discover a ''smart'' solution that don't need any programming or module install.
What I did
1) I download this extension http://www.opencart.com/index.php?route ... n_id=14026 .
That extension allows you to change the date that the product has created from administrator product panel.
So for created date you can put the date that the pre-order item will release
A link of opencart look like this for categories domain.com/index.php?route=product/category&path=282
I add some extra ''information'' at the end of link and I make it to look like this
This helps you to sort the items by date added
3) In the Top Menu of my category I put the link that I discover so now my sort is by release date
A lot of people try to find a similar solution for free. That I think it's the most easiest and free solution for someone who don't know to write programming.
What do you think about my solution?:D