The Metal Gear Solid series is no stranger to cameos and product placement—MGS4 let players use a virtual iPod, while Solid Snake made an appearance in Super Smash Bros. Brawl on the Wii—and the upcoming MGS: Peace Walker on PSP won't be any different.

According to a report from 1UP, Peace Walker will feature collaborations with two different game series: Monster Hunter and Assassin's Creed. The Monster Hunter section will allow Snake to explore a part of that game, using his own particular stealth skills to dispatch monsters. Meanwhile, the game will also feature the "assassin's straw box," originally announced as an IGN April Fool's joke, which can hold two players at once during co-op play.

The game will also be rife with product placement, so expect to see Doritos, Axe, Sony Walkman, Pepsi, and Mountain Dew, as well as a number of different Japanese clothing companies and gaming and manga magazines sprinkled throughout the game.

In addition to all the in-game advertising and collaborations, series mastermind Hideo Kojima also spoke about his decision to release the game on the PSP, explaining that he hopes the game will appeal to a younger audience.

"Peace Walker is an experiment to see if younger generations could enjoy MGS as well," he explained. "It's also an experiment to see what MGS will need to be like in the future, when hardware platforms are less important and gamers will be able to play their title of choice anywhere they want. It may not be a sequel on a high-spec console, but it is a new challenge for the series."

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