If you downloaded the .swf file to play offline, many Decision 3 builds have "site-locks" that prevent the game from loading assets unless it's on a specific URL. If you are trying to play a local copy, you likely need a "hacked" or "unlocked" version of the file that doesn't check for server-side audio.
Since the game was originally built for Flash, modern browsers or emulators (like Ruffle) might struggle to map the audio paths correctly. unable to find file audio se decision 3 work
Because Decision 3 is hosted on dozens of different flash-game sites (Armor Games, Kongregate, etc.), the issue is often server-side. If one site is missing the "audio/se/work" file, another might have it. If you downloaded the