This is going to be the most challenging part and is what i would call soul destroying. Building links to your flash game arcade is time consuming, hardwork, annoying at times and in my opinion never ending.
As I have mentioned before any links pointing towards your arcade that have been created with your built in traffic exchange program, exchanging links and doing the 3 way link exchange. There are many other options available too.
You can submit your site to online directories; there are free and paid ones. To find directories just type into Google "list of directories" and there are many sites that have hundreds of them listed. Though the majority of directories will not give you much page rank they still create a link to your site and the benefit here is you do not have to link back.
Join forums and get involved. Answer questions and ask questions, at some point you get to create and leave a signature for every post. Make the signature link through to your arcade, so that every question asked or answered you gain a link to your site without linking back out. If you join game related forums and then the links that are created will offer more value to your website.
Post comments in blogs, though a lot of blogs insert a no-follow tag to any link that is created this does not mean you shouldn't do this. I believe some page rank is still passed through, even if it is a small amount as if it was a do follow link. Leave comments at game related blogs to make the link value stronger, but please do not spam.
Write articles and post them at article sites, these can become very strong links as you have used the keywords in your article that you would like your arcade to rank higher for in the search engines. At the end of the article the link points towards your arcade. Don't forget that articles alone can create multiple links and send regularly visitors to your website.
Post your site in social media sites, like twitter, digg, stumbleupon and so on. This again can create links and attract new visitors to your arcade.
If you arcade has a rss feed, then post your feed into as many rss sites as possible. Every time you load up new games this will get posted into multiple sites creating multiple incoming links.
Look for other sites to exchange links with, there are many websites based on flash games that are not arcades.
The thing that is soul destroying is that you have to keep doing this step over and over to get your site high up in the search engines. Keep going and pass all those who give up and the results will be yours.
6 Articles - 6 Steps. Learn how to do SEO for an arcade website. All areas covered from contant, on-page and off-page SEO.
Written by Michael Bunn from Flash Games Master