Since I watched the First Episode of "Is It Wrong to Try to Pick Up Girls in a Dungeon?: Sword Oratoria" (Long Title, I used "DanMachi" short name instead) a small portion of the scene can heard, and I was like "Hey, that sounds like Uncharted 4?"
what's that mean? Apparently, one of the Soundtracks of DanMachi: Sword Oratoria almost has the identical sound as Uncharted 4: A Theft's End. I even double-checked around well known websites, and so far, I haven't seen anyone talked about this. (unless I missed something).
for this mashup, this was originally going to be a comparison video, but by the moment I started editing the music, it'd quickly became a Mashup.
"Are you sure its a Mashup, it sounds identical to me?"
Here's the two sounds that I'd recommend you to listen and then compare between the two:
Uncharted 4 Soundtrack: Those Who Prove Worthy by Henry Jackman
DanMachi: Sword Oratoria Soundtrack - Warfare by Keiji Inai
Although, I tried my best on making sure it blends well with the two videos (I edited it on Vegas Pro 14, i'm not a music master), I like the end results.
for the "Mashers", You're happy to make your own version of the same mashup, perhaps you can make it waay better than I did. :)
PS: judging by the song, I think Keiji Inai is a big fan of Uncharted.
UPDATE 10/11/2017: If you like the Mashup, you can download the music in MP3, WAV & FLAC format