Finally I could extract all the sounds from this game for modding use in AVP2, but I have some issues to identify them.
See, I spotted four .pck files that contain (I guess) all the sounds of the game, so I extracted them with Wwise Unpacker Master and converted them into .ogg files.
Now the problem starts here, since there are more than 8,000 sound files and they're named as numbers.
KingKenny told me that modern game sounds are clustered in .pck files and they have assigned numbers, unlike old games (like AVP2, that has its sounds clustered in folders and every sound has a name).
Does anyone know an easy way to identify these sounds, that doesn't involve listening one by one?
I learned that in Predator Hunting Grounds, a recent game, has its sounds in .bnk files but there are .txt files that identify almost all sounds by its number.