Sam does what his objectives wants, but sometimes they went unused in order to maintain the game's pacing or just unnecessary. In this video, you'll see some of these moments that was meant to be in the game. They sometimes ended up on the PlayStation 2 and GameCube release, if you follow the steps to trigger these unexpected events. Otherwise, hacking is required.
If you believe there's more of this or I've made a mistake in some of these objectives, please feel free to comment below.