For the longest time I have wanted to find music similar to these two songs, but I have never known the name of the style, or any other way of finding more:
Maybe someone here can point me in the right direction!
It's not an exact match, but "dubstep" is a popular recent musical subgenre that combines electronic dance music focused around similar kind of scratchy/rumbly synthesized bass line. That might be your best starting place for finding similar songs.
What I hear: bpm - 90-120 bpm, lateral march for thrashing, aggressive bass that is distorted, no particularly driving melody lines from the tenor or treble ends and reliance on dark ambience.
The music I am hearing is EBM grooves. Most EBM is less cinematic than what you have there (given that what you are listening to is a videogame soundtrack) but it might do the trick. It's also a bit faster at regular speed. At regular speed. Pitch it down 10% and you have what you are looking for. Not many playlists out there that don't mix it with other sounds so you might enjoy the potpourri in these mixes.
The following mixtape has a playlist for you to peruse.
These two songs are pretty rad:
