Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of video game developer Take-Two Interactive Software (Nasdaq: TTWO) started the day trading sideways on sleepy volume, but jumped as high as 10.2% in suddenly-torrential afternoon trading.

So what: No, the company didn't release earnings at noon -- that event comes next week. This spike comes from overwhelmingly positive reviews for Take-Two's just-released crime drama L.A. Noire.

Now what: By "positive reviews," I really mean "gushing, effusive flattery that would make an old sailor blush." Total Video Games calls it "A defining moment in video games of this generation" and Game Informer raves about "an adventure I won't soon forget, filled with characters as fascinating as they are flawed." If sales match up to the reviews, this Rule Breaker could have another hit franchise of Grand Theft Auto's magnitude on its hands, which should make Electronic Arts (Nasdaq: ERTS) and Activision-Blizzard (Nasdaq: ATVI) shake in their boots. I had expected Take-Two to take off when the next GTA installment was announced, but this out-of-the-blue success is an even better catalyst because it's renewable.

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Fool contributor Anders Bylund holds no position in any of the companies discussed here. Motley Fool newsletter services have recommended Activision Blizzard and Take-Two Interactive Software. The Motley Fool owns shares of Take-Two Interactive Software and Activision Blizzard. Motley Fool newsletter services have recommended Synthetic Long in Activision Blizzard. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool is investors writing for investors.