Gameplay videos/trailers.

I would likt to have infromation of how many units of particular game were sold in every week.

If a game is multiplatform than links to other version would be useful (if we are looking a Xbox version of Madden there shold be links to PS3/Wii/PSP/Xbox360/PS2 etc. versions of Madden).

Make it known what series the game is part of.

e.g. Mario Golf 64 is part of the Mario franchise and the Mario Golf series.

it might be a bit much to have in every games data its sales for every week, but maybe if the games had, say, their first 3 or 4 weeks of sales in US?

 Maybe a "related games" feature. Also you could have the release date on the end so it would look like:

Game D (2007)

*****

Related Games:

Game A (2004)

Game B (2005)

Game C (2006) 

take out the user review score, and add an average for what the profesionals have scored it at, excellent game's that should be 9's or 10's have scores of 6's and 7's with the user reviews

 Agreed.

It would be nice if user reviews were honesty. But fanboys will be fanboys. 

I agree with Metacritic/Gameranking scores.

I would love to view sales for games that sold less than a million.

I agree with this suggestion as well. The user review score really isn't interesting or useful at all. An average score from the 5 most respected professional sites would be much better.

You already can :) just search a game in the games database