 The service also supported various other titles, including other id Software games such as "Doom II" and "Heretic" as well as titles from other companies like "Duke Nukem 3D", "Blood", and "Shadow Warrior" from 3D Realms.To use the service, players would pay a fee and run the DWANGO client software which would dial into a DWANGO server.Initially, a phone number in Houston, Texas had to be dialed, but soon a number of servers in other cities were also set up.