Recently my two earlier tracks of fantasy ambience genre has hit the Steam market in the game called Ziggurat by Milkstone indie game dev company. Amongst other great tracks in the album it is the ones that are played while discovering foreboding areas in the fast paced action RPG game, which much resembles the old classic game Hexen from the 1990's. You can have a listen to the tracks on Jamendo. Both are quite low profile, game music soundtrack alike stuff. I recommend to listen to the full album if you want some unique classical/sountrack experience.
Temple Exploration: https://www.jamendo.com/en/track/1123287/temple-exploration-ambient and
Cave Exploration: https://www.jamendo.com/en/track/1123293/cave-exploration-ambient
The full album is available here: https://www.jamendo.com/en/list/a134283/scourge-2-game-music
The game's official page is available here: http://www.milkstonestudios.com/games/ziggurat/