and this is pretty much the only place I could ask

4 songs have been identified while other 4 remain unknown

Tutorial/Boss Theme/The Horde - ??? Cannons and Cocktails - Hawaiian Sunrise (instrumental) Deep Trouble/Splashdown - ??? Frostbite - ??? Falling Objects - ??? The Boneyard/Citadel's Shadow - Moonlight Sonata Aperture Science/Portals for Pros/Dimension Hopping - Still Alive (remix unknown) Shadow's Citadel/Final Boss - Drawcia Sorceress remix

I would like to know if anyone knows where these songs are from, specially the boss one I've tried to ask everywhere but to no result

Frostbite has been id'd as Croc 2 - It's Just Snowball Madness!

Deep Trouble/Splashdown has been id'd as Hesitation - Filippo Vicarelli