If you can share where you got this file (Hugging Face repo, GitHub, etc.), I can give a more precise description. Otherwise, the above covers 90% of real-world uses for such a filename.
The file is a specialized data component used in video game "repacks," most notably those distributed by FitGirl Repacks. It contains localized audio and text data specifically for the Brazilian Portuguese language. What is the Purpose of "Selective" Files? fg-selective-brazilian.bin
Notice how common words like "O", "da", "em" were skipped silently—they never passed through the heavy BiLSTM layers. If you can share where you got this