I was looking for some guide lines on adding games, I've stumbled on this page: https://www.speedrun.com/support/learn/moderation-rules

and the link under "general site rules" is broken.

Is there still a general rule page ?

I was searching if it is okay to add a game that I created

edit : okay there's still a general site rules in the section on the left, so it should be an easy fix for whoever has the right to

Yes, the site rules are now located here: https://www.speedrun.com/support/learn/site-rules

There are also game request rules here: https://www.speedrun.com/support/learn/requesting-a-game with a few more on the support ticket game request page