Not really a mod, but I guess it could be packaged up as one. If you have XCOM 2 installed, chances are that you have the original soundtrack as well. For what it may be worth, I tested out some of the XCOM 2 music in openxcom -- here are the files that I found to be a good match:
| Original Filename | XCOM 2 Title |
| GMDEFEND | Advent Coalition |
| GMENBASE | Last Hope |
| GMGEO1 | Out of the Ashes |
| GMGEO2 | Welcome to the Lab |
| GMGEO3 | Implants |
| GMGEO4 | Alien Fortress |
| GMINTER | Avenger Attacked |
| GMINTRO1 | New World Order |
| GMINTRO2 | n/a (too short for most of the music) |
| GMINTRO3 | First Flight (this one works very well here!) |
| GMLOSE | Game Over |
| GMMARS | Ambush |
| GMNEWMAR | Commander Awakens |
| GMSTORY | Lazarus |
| GMTACTIC | Infiltrator |
| GMTACTIC2 | Break the Line |
| GMWIN | Victory |
Disclaimer: I haven't gotten to all the sounds in the game yet, so it's possible that the endgame stuff doesn't work as well as I think it should. But for the normal stuff, so far it sounds pretty good.
