eBusiness: Adsense for gaming web site

[daxion]

I wonder how I can have more successful adsense advertisement for my gaming web site, especially on the pages about the first person shooter half-life series? These pages are the main traffic driver on this web site, but since Valve don't have any affiliate program, I would like to have some adsence advertisement. Right now, the ads shown are not efficient. Can I steer the ads shown by adsense to a product?

Anybody knows what would work for this kind of pages? What product or advertisement could be successful? How can I steer Google Adsense to produce more successful ads to these pages?

For managing the advertisement on my websites I use Openx Ad Server.

Any help are much appreciated, even if only pointing me in the right direction for further reasearch.