So I finished playing Castlevania: Symphony of the Night (both castles) and that OST is by far my favourite in gaming so far. But of course there are others, so I will make my top ten OST in gaming.

1 - Castlevania: Symphony of the Night

2 - Final Fantasy II (IV)

3 - Doom I and II

4 - Final Fantasy IX

5 - The Elder Scrolls (well, I only played Oblivion and Skyrim and most musics in Skyrim are just Oblivion ones with a another "feel" and I know MW theme has the same touch of Oblivion and Skyrim)

6 - Metal Gear Solid

7 - Megaman X

8 - Donkey Kong Country 1

9 - Marvel vs Capcom 1

10 - Top Gear (a racing game from SNES that made a HUGE success here in Brazil)

Edit: Final Fantasy IX, not XIV

My are:

1: The Elder Scrolls V: Skyrim.

2: Castlevania: Symphony of the Night.

3: The Elder Scrolls III: Morrowind.

4: Metal Gear Solid (PS1 OST).

5: Ys III: Wanderers from Ys (Turbo Graph-16CD).

6: The Elder Scrolls Online OST.

7: Final Fantasy: IV DS OST.

8: Final Fantasy VI.

9: Final Fantasy VII.
10: The Elder Scrolls IV: Oblivion.

1. Morrowind

2. Oblivion

3. Baldur's Gate 2

4. Vanguard: Saga of Heroes

5. Dragon Age: Origins

6. World of Warcraft

7. Everquest 2

8. Planescape: Torment

10. Knights of the Old Republic

San Andreas. 'Nuff said.

K-Dst and Radio X!. GTA V isn't better than SA just because of the radio stations!