We have that here:

https://www.pricecharting.com/game/playstation-4/gran-turismo-sport

And the limited edition:

https://www.pricecharting.com/game/playstation-4/gran-turismo-sport-limited-edition

Added Nintendo Power.

https://www.pricecharting.com/console/nintendo-power

I'm going to let people request specific magazines in other threads so I know which are the most popular.

We've added Nintendo Power issues

https://www.pricecharting.com/console/nintendo-power

Not exactly strategy guides, but very similar

Do you get an error message at all?  You have to have contributor status on the site in order to add a game so not all users will be able to use it.

This tool is live for all users with contributor privileges.

https://www.pricecharting.com/add-product

After you use it, please give us any feedback to improve it.

Sorry if you did not receive enough notifications.  I'll look into that. I can restore your collection for you.  Please give me the link to your empty collection page and I'll restore all the items for you.

https://www.pricecharting.com/game/jp-sega-dreamcast/hello-kitty-dreamcast-system

This is a new console and games.  You can vote for that issue:

https://pricecharting.userecho.com/communities/1/topics/512-add-hyperscan-console-and-games

https://www.pricecharting.com/game/super-famicom/super-famicom-system

That console is added here:

https://www.pricecharting.com/game/neo-geo/neo-geo-x-gold