I'm unsure which games two of the tracks on this album came from:
05 どたンばたン -Old Japanese Techno Mix- and
07 Battle#2 -Guilty Mix-. If I were to take a guess, I'd say track 7 is from Shizuku, since there's an arrangement on
Leaf Visual Novel Series Arrange Sound Tracks – ORANGE of a track called "Battle Scene 2," and both that track and -Guilty Mix- were originally composed by Shinji Orito. There's no track with that name on any of Shizuku's soundtracks, but there is one just called "Battle," track 16 on
Shizuku • Kizuato Original Soundtracks, which is also composed by Orito.