In response to the growing use of sophisticated digital encryption to conceal potential threats to the national security of the United States, the NSA (National Security Agency) has ushered forth a new dawn of intelligence-gathering techniques. Ubisoft also brought in veteran actor Michael Ironside to provide the voice for Sam Fisher. While the game ran on Unreal Engine 2 engine, Ubisoft utilized the engine for dynamic lighting effects as well as well as creating realistic physics (such as the soft physics). Ubisoft Montreal focused on making a more realistic approach to the stealth genre, and in doing so had to do research on developing technology, such as the suit that Sam wears, the type of tech for surveillance and the gadgets, and so on. Though Tom Clancy later approved of it as Ubisoft made use of it as Sam Fisher's signature style and explained that having two separate devices, which the player would need to interchange, would be highly detrimental to gameplay. This is due to the issues such a device would have with size and cost in real life. Tom Clancy at first did not approve of the tri-focal goggles, which were said to contain both night vision and thermal vision, as it was unrealistic to have such a device. Tom Clancy endorsed it while also being a support writer for scenarios. Ubisoft Montreal was tasked into creating a revolutionary stealth game that took elements from Thief and Metal Gear Solid. Eventually, The Drift was dropped, while elements retained in what would be known as ' Tom Clancy's Splinter Cell', a game based on Ubisoft's directive to Ubisoft Montreal to make a ' Metal Gear Solid 2 killer'. The Drift was a prototype of things to come, but was described as having 'no soul', despite incorporating ideas and concepts that were ahead of its time. The player could use their multi-purpose gun to grapple walls, fire cameras and even change vision models. Ubisoft initially started development on a title called 'The Drift', where the game was originally a third-person shooter in a futuristic-retro setting where Earth had been destroyed and major cities of remnant humans built cities on the debris of the earth. Tom Clancy's Splinter Cell is the first video game in the Splinter Cell franchise, and was also the second Tom Clancy's brand video game franchise that was not originally based on a Tom Clancy book (with the first being Tom Clancy's Ghost Recon, which was released in 2001 for the PC). 6.9 Xbox 360 (Backwards Compatibility) (2018).

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