" "3D&T is a Brazilian roleplaying game, created by Marcelo Cassaro. It is designed to be a very simple, beginner-friendly game system.
The name of the game is a pun on the famous Dungeons & Dragons or "D&D"; the original version of the game Defensores de Tóquio ("Defenders of Tokyo") was a satire of tokusatsu, fighting games, and anime series. It was published by Trama Editorial, later known as Editora Talismã. It spawned "AD&T" - as implied by the name, an "advanced" edition (and a pun on AD&D). Finally, "3D&T" means "Defenders of Tokyo 3rd edition". The major change on the 3rd edition was that it was turned into a generic game, dropping its satire roots. It was a huge success, becoming as popular as Dungeons & Dragons and Vampire: The Masquerade among Brazilians roleplayers.
An even simpler version, "3D&T Fastplay", was made freely available online.
A revision, "3D&T Super Manual Turbo Revisado", was released in 2003.""
Source: Wikipedia, "3D&T", available under the CC-BY-SA License.