Video games have often been described as 'cinematic', sometimes incorrectly. Just because something is 'epic' doesn't really mean that it's cinematic. I suppose this ties into the whole "Are Video Games Art?" debate (which I won't get into right now other than to say "parts of them are"), but my point is that 'cinematic' gets tossed around a lot in places where it probably shouldn't.
Having said that, Red Dead Redemption is a cinematic game. Nowhere is that more apparent than in a fairly underrated sequence that occurs shortly after completing the first segment of the game. Protagonist John Marston has raided the fort (gattling guns are hardcore), only to find that his quarry has escaped to Mexico. In the finest of Rockstar traditions, the bridge to Mexico is out, so he enlists the help of the local town drunk, Irish, to ferry him across the river.
Not surprisingly, things don't go exactly as planned, and the duo must fend off what feels like the entire Mexican Army to get to their landing downstream. At this point, Irish bids him farewell, and John must travel to the nearby town by himself.
As he's riding, the ambient noise and normal background music dim, and a heretofore unheard song is played. For several minutes, the song takes center stage, as Marston gallops on. Nothing interrupts your journey. There are no bandits, no cougars, no crazy scripted happenings. For the duration of the song, Red Dead Redemption allows you to simply take in the sights and let José González' voice wash over you as you realize how incredibly alone John Marston really is. Few games would be content to leave that much time free of any sort of traditional "gameplay" in a non-cutscene in the middle of a game, fewer still would pull it off as well as this.