Citi-Block was written by Richard Halliwell, Carl Sargent, Alan Merrett, and Graeme Davis, with art by Gordon Moore and Dave Andrews, and was published by Games Workshop in 1987 as a boxed set with a 20-page booklet and 12 color cardstock sheets (four pages of cut-out props and eight 11" x 16" floor plans.
In Issue 35 of Challenge, John A. Theisen called the floor plans useful for anyone who was having trouble visualizing a Mega-City Block, and found they were well-structured, easy to use and well-planned.
[2] In the July 1989 edition of Dragon (Issue #135), Ken Rolston called the floor plans "perfectly designed for role-playing displays."
He called the charts and guidelines for creating a Mega-City block in the rulebook "admirably detailed and specific, and are an essential supplement for anyone running a Judge Dredd game campaign."
Rolston concluded, "As floor plans for role-playing displays, the Citi-Block pack is good-looking, utilitarian, flexible, and suitable for many near-future SFRPGs.