What is the significant thing about (videogame-)soundtracks for you?
Soundtracks are often a by-product. Whether in a movie, series or game, there are very few examples in which musical accompaniment is absent - and it is usually really worth listening to. However, this means that soundtracks are always created with the intention of complementing a moment, a scene or a section within a movie or game. They are therefore not an independent product like a music track from an 'ordinary' music album.
But just as an album can be conceived as a whole, some soundtracks also work on their own. I try to take this into account in my reviews. However, I can't promise that I always do this successfully. Fortunately, more and more producers and publishers are recognizing the market and releasing original soundtracks (OST for short) to offer consumers a curated selection.