Awesome / Splinter Cell

• The entire Kaliatek mission. You get your SC-20K assault rifle in the previous mission, but you can't kill anybody with it because they're CIA agents. But the Kalinatek mission has no alarm limit and pits you against a building full of evil mercenaries, so you can go nuts! You don't even have to hide the bodies.
• The end of the Abattoir mission. This is one of the very few instances in the first Splinter Cell where you must fight the enemies. The scenario: a group of kidnapped Chinese diplomats and American POWs are imprisoned in a slaughterhouse in Myanmar and scheduled to be executed. Sam having discovered them throws the bad guys' plan off and so instead, Vyacheslav Grinko decides to just kill everyone at once. The American soldiers have been starved for two days and are in no shape to fight. It's just Sam against six Georgian soldiers + Grinko. Depending on how you play, this can turn into a massive shootout worthy of a Hollywood epic movie, or you can fight unfairly by setting up wall mines and using reprogrammed gun turrets to kill the enemies for you.
• In the second Chinese embassy mission, causing the explosion of the nuclear bomb's truck (without causing a nuclear chain reaction of course) is quite rewarding.