The video game industry is a multi-billion dollar industry, expanding exponentially on the web and mobile devices so it can be a bit overwhelming at times when formulating a strategy for your video game, whether you are a developer or a publisher.
The first thing to look at is your budget, and using already created established sites to promote your game. There are numerous places to get your games listed such as Free Website Directories. Of course you can also write a quality article on what makes you game different and submit to the top Article Directories.
Social websites will help spread your game the easiest, such as Digg, Stumbleupon, Facebook, GameFriends, and Reddit. The goal here is to get your website listed on as many free social bookmarking / networking sites available. YouTube is the second largest search engine on the web, yet many ignore it, or simply underestimate its power. Make sure you create trailers, ingame footage, and perhaps an interview with the development team to ensure your game is talked about with thousands of targeted gamers.
Top sites are also a great way to share traffic, where you add a banner on your website, because they add yours; this is best served for indie games as big budget developers and publishers will want to focus mainly on Social Media. If the game is going to be in existence for more than five years, such as an MMORPG it’s best to also invest in SEO (search engine optimization).
The combination of Search Engine visitors and Social media will make any pre and post launch successful. It doesn’t hurt to make friends in the video game industry either (to submit your press releases and blog about you).