2 years ago my brother and I made a vocaloid concert mod
gamebanana.com/l4d2/skins/1081… for L4d2
Right now I'm doing a revamp on the textures and I'll upload it to the new L4d2 workshop so if you're on steam look out for it please
Here's a video of it so you can understand what I'm talking about and also know that I'm not going to change the songs.
youtu.be/yJAJf-wQlz8