If you try playing regular multiplyer over the internet, you'll still be prompted for a key and I can't guarantee that a correct key will even work with this crack installed. I tested this with Single Player and LAN Multiplayer with the Last Man Standing Mod, both computers having the crack and never experienced any issues. This is the second crack that I've managed to make (by luck). I can't promise that I used the hex editor appropriately considering I don't know much about cracking however I got lucky and this crack simply works for me and that's all I really care about. so I took a stab at making one myself since the one for 1.3 doesn't seem to work with this version.
There didn't seem to be a key check crack out there for 1.3.1.
