"Duke Nukem 3D" features multiplayer. At the time of its release, Internet-based gaming was just beginning. "Duke Nukem 3D" did not support the TCP/IP client/server model, instead based its network play on the IPX LAN, modem or serial cable. "Duke Nukem 3D" players often either battled modem-to-modem, using the IPX network utility Kali or the Total Entertainment Network (TEN) online pay service. Kali allowed users to connect to a chat room to host and join games. "Duke Nukem 3D" was one of the more popular games on TEN prior to the closure of the network in 1999. The game was also supported by DWANGO.