The Dial-up Wide-Area Network Game Operation, better known by the acronym DWANGO, was an early online gaming service based in the United States. Launched in 1994, it was originally known for its compatibility with "Doom", for which it functioned as a matchmaking service for online multiplayer. 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.