* "The Exchange". As the last mission, it is where you FINALLY get to kill [[spoiler:Catalina]], and with a rocket launcher no less. Made even more satisfying by the difficulty- you start with no guns and there's no checkpoints along the way.
** Plus the news report cutscene that ends it.
* Flying the Dodo (a plane with crippled flight mechanics) succesfully. Around the city. Especially to ''Ghost Town'', the (normally unreachable) part of the city where the intro takes place.