I finally got around to playing the original Splinter Cell (started the series with Pandora Tomorrow when I got it as a gift, somehow I never ended up playing the original until now) and man is it weird to go backwards into the series. Compared to Chaos Theory, there are a lot of required firefights where the AI knows where you are (thus rendering the main point of the game null), all the levels are very linear and sometimes only have one viable solution, and the lack of grading system meant I had to relearn how to play since the game wasn't designed around zero killing.
Speaking of zero killing, is it possible to get through this game without fatalities? Outside of the three required firefights (where I initially tried to not kill anyone, but the all-knowing AI and the hostages in one made this impossible) I only killed one guy because it was impossible to rappel into an office without shooting the window (thus alerting the guard, and without the SC20k there were no ranged nonlethal options). I managed to knock some guys out in the first required firefight, but the limited supply of nonlethal ammo prevented me from being able to duplicate that for the later ones.
I guess as an extension of the first question, is it possible to ghost the first game? Several areas don't seem to have enough space to facilitate that, especially without a whistle command (unless there was a whistle button, I forgot how to zoom until halfway through and how to hold breath until the literal end when I had to snipe Nikoladze and decided to check the "equipment" section).