do all android games don't have background music under any conditions

Not all Android games lack background music. Many games include it as an integral part of the gaming experience. However, there are several reasons why some games might not have background music or offer options to turn it off:

1. Resource Management: Developers might choose to exclude or provide optional background music to save on storage space and data usage, especially for games targeting regions with limited internet access or devices with low storage capacity.

2. Battery Life: Continuous playback of audio files can consume more battery power. Thus, some games might strategically omit background music to extend battery life on mobile devices.

3. User Preference: Some players prefer to listen to their own music or need silence due to their environment (e.g., in a library or while sleeping). Offering the option to disable music caters to these preferences.

4. Ambient Sounds: In some games, environmental sounds or sound effects are prioritized over music to enhance the game's atmosphere or realism.

5. Narrative Focus: Certain games might opt for silence or minimal sound to emphasize the story or emotional impact, without the distraction of music.

6. Development Constraints: Smaller development teams or those working with tight budgets might not have the resources to create high-quality background music.

7. Technical Limitations: Older or less powerful devices might struggle to handle audio playback along with game graphics and mechanics smoothly, so developers might exclude music to improve performance.

8. Licensing and Copyright: Music licensing can be expensive, and sometimes developers may choose to avoid these costs or complications related to copyright.

9. Game Design: The absence of music can be a design choice aimed at creating a certain mood or aesthetic.

10. Background Music as a Feature: Some games might offer background music as an unlockable feature or purchasable add-on.

In most cases, however, games do include some form of audio, whether it's background music, sound effects, or voice acting, to enhance gameplay and engagement.