Wind, footsteps, climbing clips and radio squelch are currently synthesized locally with Web Audio. No API keys, remote generation or microphone access are used by the game.
Wind grows stronger with model elevation. Sound starts after entering the game, pauses with the expedition, and stops when the tab loses focus. Sound and volume preferences are saved on this device.
Stock recordings have not been included. Pixabay candidates were identified, but their download pages were unavailable to this environment. Wind Blowing by SoundReality and Footsteps on Nature Trail by DRAGON-STUDIO remain candidates, not used assets.
Pexels publishes its videos without audio, so no Pexels sound is included.