In 2007 China and North Korea are unhappy with Japan's new Information Self-Defense Force as they believe it violates Article 9 of the post World War II constitution (there is a news report about the I-SDF in a cutscene in Pandora Tomorrow), which restricts Japan from possessing any armed military force capable of striking outside its own borders. Chaos Theory was later remade for the Nintendo 3DS as called Tom Clancy's Splinter Cell 3D and it is also part of the Tom Clancy's Splinter Cell Trilogy for PlayStation 3. A demo was released for OXM in which the lighthouse mission can be played. It is unknown why Ubisoft Montreal decided to go with this rating but speculation suggests they wanted a more realistic Splinter Cell game than in the past. This is also the first game in the franchise in which it is rated M for mature. Michael Ironside returns as Sam Fisher while Don Jordan returns as Lambert who was previously voiced by Dennis Haysbert in the last game. They also added Co-Op storyline that works side by side with the main campaign. From the point where when it rains, Sam becomes wet. In doing so, they used a modified Unreal Engine 2.5 to create a more detailed game. Ubisoft Montreal returned to develop the third title in the franchise. 4.1 Version 1 (Xbox/PC) Downloadable Content.

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