How I can filter games only in the gog games list?
The search shows "2001 DRM free games" but a lot of these games are sountracks only...

Yeah. It's odd as to why they don't have a filter yet to exclude DLCs and Soundtracks, leaving the base game results if they are needed. However, you can use the <span class="bold">MAGOG</span> search engine to find any range of games to your specifications. Then copy the title and paste it to the "search box" at the top of GOG.com to fetch the game you wish for.

They sufely didn't have soundtracks in mind when the site was designed. They could have their own category, but their numbers probably don't justify it. Maybe they could combine them with the movies? It doesn't seem like they are adding more of those any time soon.

Thank you for the MAGOG suggestion, Nicole28.

Very annoying. You can filter the gog games list by every detail, but you can not remove the soundtracks and DLSc from the result list. Please move the soundtracks to an own category like the movies.

Other curious thing: Why a soundtrack needs the same attributes like the games? For example languages or operating systems? I can play the soundtrack with every operating system.. or with my car radio. It seems GOG.com needs a database update to exclude the sountracks from the game library.

Why is this a problem? Yeah it inflates the number of "games" on GOG library (it is more like "games and game-related items" than actual games), but besides that? I presume they are on the games list because they are usually DLCs for certain games, even if they don't include more gaming content, just extra fluff.

I think there are also other DLCs which include e.g. making-of videos, e-books etc. Should they also have their own category since they are neither games, nor soundtracks?

Meh. As long as the soundtrack items clearly state that they are soundtracks (soundtrack DLCs) and not actual game content, I am fine.