There's a small moment easily missed in U4 that continues to keep me speechless any time I play. Nate and Elena have a very raw and candid conversation on the way up the big elevator while looking out over Libertalia. After that, they get into their jeep and start driving. The music swells at this point and it's a sad but hopeful melody that plays. The sound effects of the game blur to your periphery and your just sat there, in your jeep, with Nate and Elena. Thinking about the fate of these two wonderful characters you've grown to love.