The challenge was to start at one end of a street of terraced houses after dark, and work your way down the entire street via the back gardens.
So a gang of you would have to carefully climb over each garden fence to gain access to the next garden and so on until you reached the end.
Rules were:
If there was a slide, everyone had to go down it
Ditto garden swings
And horrified at this memory if there was a rabbit hutch, you had to 'set them free' 
I suppose we were late primary/early secondary age and to best of my knowledge I don't think we ever got caught.
Was this just a thing where I grew up, or did others do similar?
Circa mid 80's