Posting some Video Game OSTs:
The music in the Factorio Trailer really sold me on this game, along with the quirkiness of the game mechanics. Probably going to purchase this.
Mick Gordon did himself well in some of the DOOM soundtracks. It really matches the whole "kill everything gore shit" kinda vibe.
This OST, in my opinion, requires you to have played HL2 through at least once to get the whole feel for it. Valve outdid themselves with some of the HL2 soundtracks. When this played at the end of "Ravenholm", it really gave a sense of emptiness and despair that befell cities and human civilization as a whole.