We check this website, now rockstargame.su is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is rockstargame Down Right Now? - NO! rockstargame is up!
If you have problem with access to site rockstargame, and domain rockstargame.su is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).