My time has come. As someone who almost exclusively listens to instrumental soundtrack from movies and games, including from games I have never played, these are the ones that most often get stuck in my head (in no particular order). A plus "+" indicates a song that got stuck in my head regularly before I ever played the game, while an asterisk "*" indicates a song that still gets stuck in my head, despite being from a game I have never played at all.

1. Baba Yetu - Civ IV (+)

2. Hyrule Castle - Breath Of The Wild (+)

3. Lorule Castle - Link Between Worlds (*)

4. One Final Effort - Halo 3 (*)

5. Golem King - Moonlighter

6. Song of the Ancients - Nier Series (*)

7. Dragonborn - Skyrim

8. Far Horizons - Skyrim (+)

9. Dragon Roost Island - Wind Waker (*)

10. Nate's Theme - Uncharted (*)

11. Gusty Garden Galaxy - Super Mario Galaxy (*)

12. Korobeiniki - Tetris (+)

13. Gerudo Valley - Ocarina of Time (+)

14. Colgera Battle - Tears of the Kingdom

15. This Song - The Witcher 3 (It's the song Aen Seidhe, but without vocals)

16. Bloody Tears - Castlevania (*)

But finally, the song that I credit with making me obsessed with instrumental soundtrack, because I fell asleep with it playing on repeat for a whole night at the age of 5, and then lost the game cartridge, so I forgot what it was from, and which I would get stuck in my head roughly once a month throughout my entire childhood until I finally found the song THIRTEEN YEARS LATER:

Ω) Town Theme - Final Fantasy II