Video-game companies are moving up a level on Monday, ahead of the Electronic Entertainment Expo.

While E3 doesn't officially start until Tuesday, investors are expecting positive news from the conference, where video-game makers will present initiatives for the coming year.

Shares of

THQ

(THQI)

soared 9.5% to $7.04, while

Activision Blizzard

(ATVI) - Get Report

inched up .4% to $12.13, after the company gave a glimpse into its video-game lineup for 2010.

Video-game retailer

GameStop

(GME) - Get Report

jumped 3.5% to $25.83. Last month, the company

issued a second-quarter warning

, saying strength in the quarter could be waning.

Electronic Arts

(ERTS)

rose 2% to $23.39,

Sony

(SNE) - Get Report

, maker of Playstation 3, saw a 4% increase to $27.33, while

Microsoft

(MSFT) - Get Report

, which makes Xbox 360, rose 2.5% to $21.41.

Still, just because E3 is experiencing an upswing after two years of downsizing, that doesn't mean the video-game industry is returning to its heyday. Only 40,000 people are expected to attend the convention, compared with some 70,000 in 2005. This, however, is far more than the approximately 5,000 that attended in recent years.

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