This rip is the victory theme for Solid Snake, who in the King for a Day Tournament represents rips with music from the Metal Gear series and other Kojima-directed games.
The rip is an arrangement that incorporates the backing melody to "Theme of Solid Snake" from Metal Gear 2: Solid Snake. At the beginning of the rip, we hear the Alert sound effect from the Metal Gear Solid games. Finally at 0:04, Solid Snake says "Mission accomplished!".