This piece is from the same cancelled shoot 'em up game as my previous upload, Corridors. I made it in 2008 and it was supposed to serve as the song playing during the outro sequence as well as the credits. I really wanted the music to add to the seriousness and gravity of the plot and to turn even a simple animation accompanied by some text into a satisfying conclusion.
You can hear that the song is divided into several distinctive parts. The first part ending at 1:30 was supposed to accompany the rather optimistic ending sequence which tells you "yeah, you did it!". The next ranging to 2:20 where the solo sets in would show you the "dark side" of the ending telling you "despite your efforts, things look bad, the job isn't done yet" (no matter whether there would be a sequel). The guitar solo would then accompany the actual credits.