Not sure if Tacticsoft Ltd. would release SM's OST but if needed, i can record backround music and share it.

Edit:
Apparently, i can't help you out. It wouldn't be legal.
Though, word from staff is that they will do a soundtrack release sooner or later.

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Aeacus

Actually, you can use some sound recording program to record the backround music and then listen it later on.
That's what i did. Sadly, i'm not allowed to share it with the community.

But what can i do is to inform that there are 8 tracks in total and the duration of the music tracks falls between 1:09 and 2:01.
Even though the music tracks seem to be longer than mere 2 mins, it's because the music track is repeated forever and for most of the songs, it's hard to spot when the music track starts again.

Btw, that "engage" song is called "Ballad of a Mech Pilot". Well, atleast admin called it so in THIS topic.

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Aeacus