A game site is, in this respect, like a shop or a gallery site in that it doesn't have much text on the page. You should do two things: 1. Tag all the images meticulously, do all the standard on-page HTML stuff, make sure that whatever words you DO have on the page, then if they are your keywords to declare them in the keywords tag, etc. 2. Create a blog as a sub-domain, e.g. mygamesite.com/blog - and from there on you'll be on more familiar ground: tightly optimized pages, great-value keyword-rich content/articles/reviews, tagged images, well-chosen high-index value LSI keywords to help gradually build a solid and broad semantic environment and Trust Rank. Also ensure to have internal links from blog pages to selected main-site pages as well as links to high authority non-competitive resource sites, etc, etc. Make sure to apply a good keyword implementation strategy and don't focus too much on cheap links but rather on highest quality ones. This has worked exceedingly well for me on some other sites (though I never personally tried a game site yet), so there's no reason why it won't work for you!