How do I enable it? Vidtest doesn't turn it on and there's no way to add -3dfx to the shortcut because annihilus launcher isn't the exe and doesn't run from a shortcut.

For specificity's sake, and to eliminate any confusion, I run d2vidtest in compatibility for windows 7 (because that's the only way it runs), and select 3dfx from there. I'm using a copied d2 folder from 1.13 and it gets onto annihilus server just fine.

I've played several hours and every time I log out, or restart(which implies logging out), I have to use the installer all over again. Probably not normal, don't know how much it has to do with 3dfx not running.