Need suggestions. Plz help!!!!!!

Anyone have experienced in doing seo for a game website. I have done seo work for some websites individually. But as this is a pure game website, i need some good suggestions to get traffic and keyword ranking for my website.Doing link buildings,social networking and forum submissions as for now and my couple of keywords also ranking in 2nd and 3rd page.What are all the on page work should i need to do this for website?
Take a look and provide me some suggestions..
This is the website/Game -> www elsword in

To start,You can use youtube to drive traffic.You should get social network signals to your site.Its easy with facebook,twitter etc.

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