When Sam meets Shetland in the first level, Shetland asks who Sam is now working for. He guesses at SEALS and CIA. Sam replies, "No, staying anonymous," the acronym of which is NSA for whom Sam actually works.
This is the only game to include the Half-split jump (a variation on the split jump), allowing Sam to jump to another level from within a tight passage. Within half-split Sam holds one leg under his body against a wall, while the other is extended against the other wall.
The game was developed by Ubisoft Shanghi. The first Splinter Cell was developed by Ubisoft Montreal. The Montreal branch took a short break after completing the first Splinter Cell and then went on to develop Splinter Cell Chaos Theory.
At the end of the Komodo Shipyard mission, Grimsdottir mentions that the PMC working with the terrorists is "something called Displace" which Sam does not react to despite his relation to CEO Douglas Shetland. The debriefing screen, however, names the PMC not as Displace, but as Armed Guardian Services. This suggests that a last minute script change may have taken place. The idea of an antagonistic Displace International is later used in Splinter Cell: Chaos Theory (2005).
The game plants several seeds for the plot of its follow-up Splinter Cell: Chaos Theory (2005). The UN investigation called Project Watson, the controversy surrounding Japan's ISDF, the Black Gold Day market crash, the introduction of Douglas Shetland and Displace International and to a lesser extent the name "Nakariakov" are all given small mentions in this game, and while seemingly irrelevant and unrelated, later become key points in the sequel.
The name 'Pandora Tomorrow' is an allusion to the Greek myth of Pandora's Box: the story of a mortal woman who opened a box containing all the evils of humanity and released them into the world. In this case, Pandora's Box represents the containers holding the viral samples.
The pistol now has a laser sight that allows players to have a more acute shot at the expense of stealth as enemies will be able to see the dot, which can be useful if the player wants to distract an enemy.
The trivia items below may give away important plot points.
Health kits are now static and cannot be taken with the player. Depending on how badly damaged the player is he can use the same health kit multiple times. How much is left is indicated by a meter of red lights on the health kit itself.