This past month, Activision reached a deal with Frito-Lay/Pepsi to get Call of Duty: Modern Warfare on their products. In doing so, they also brought Game Fuel back for a limited time. The first Game Fuel being the one that was initially released for Halo 3, and then again for World of Warcraft. The second was this green version, which is described as "Dew with a Charge of Tropical Flavor."
At first smell, I didn't really care for it. To me it was kind of like the smell of regular Mountain Dew after you burp - so not very appetizing. I thought it would taste like it smells, and it doesn't really. The closest thing I can compare this tasting to is something like a mix of Mountain Dew and Sprite, with pineapple juice. If you can remember how Revolution tasted when it came out a couple years back, it reminds me of that mixed with Baja Blast from Taco Bell. It's not the most unique, best tasting Mountain Dew, but it's a pretty good one... if you have the option of this or the orange Game Fuel though, there's almost no reason to choose this one, unless you haven't had it before.