I don t wanna get your hopes down , but I am a part of a company that does game reviews , news , previews , etc....
we have around 20 writers for all consoles , we even receive game before releases and we will sponsoring major gaming events across Canada and some of as went to E3 this year ( ended yesterday)
Well , What people are looking for based on my experience are game cheats and walk-through more than anything else . Major game reviews will bring you traffic ( diablo 3 , starcraft , WOW , etc.....)
Well , since our website is a corporate website I can do stuff like content locking and adsense etc....
but I will suggest you to go keep your website niche related , means : Don't go for generic traffic , target your traffic as much as you can , go for micro and micro niches .
For instance now : you can watch E3 videos and check what games will come out , take the old versions of one or two games , upload videos , re-write articles from other websites , backlinks , social bookamrk , on page and off page SEO etc...
You should get some nice traffic , once the ads will show on TV , not sure but I think assassin's creed 3 is not out yet , and the ads are on TV for the past 2 months or so , so yeah take advantage that .
Once the game will be out , write reviews about it and have your walk-through section wit a content locked and monetize all the other sections with adsense .
PS: I don't know if I make sense as I didn't sleep for the past 48 hours , didn't proof read what I wrote .
Best of luck