Hi Saltiel, excellent work on documenting this, you got a lot further than I did in my attempts I'm stuck on the L2C_QUERY_UNIVERSE_LIST_ACK packet, I'm pretty sure my packets ok but I get random errors on the client with the same data so I was working on the assumption that there is some decryption taking place somewhere along the line. Have you been able to get this working? If so could you post an example packet?

 

Btw there are a few status codes above 3 for L2C_USER_LOGIN_ACK_PACKET, not got the code on me atm but you can get the client to display a few different error messages like account banned, e-mail not verified etc.