"That Long Train Ride - SiIvaGunner: King for Another Day" is a high quality rip of "That Long Train Ride" from SiIvaGunner: King for Another Day. It mashes up the King for Another Day Tournament contenders Men in Black and Donkey Kong.
This is an arrangement of "Path of Borealis" by DJ Dain, which itself is a remix of "Triage At Dawn" from Half-Life 2.
At 0:39, we hear a clip of the Overwatch Voice from Half-Life 2. From 1:11 to 1:55, "Stickerbush Symphony" from Donkey Kong Country 2: Diddy's Kong Quest is mixed in with the arrangement. At 2:18, the music stops and a sound clip of Gabe Newell saying "Thanks, and have fun." plays.