London by Night: Adventure in a Victorian City

London by Night: Adventure in a Victorian City is a sourcebook published by Ragnarok Enterprises in 1984 as a supplement to the multi-genre role-playing game To Challenge Tomorrow.

[2] Four short scenarios are included, two concerning the occult and supernatural occurrences, and two of a more investigative nature – one involving Egyptian mythology, and the other an encounter with Sherlock Holmes.

[3] Ragnarok also released a number of supplements in 1984 including London by Night, a two-booklet set[3] created by Dave Nalle and packaged in a plastic bag.

"[2] In Issue 72 of Space Gamer, William A. Barton thought the "great deal of data" would be of use to gamemasters of other role-playing games such as Call of Cthulhu or Mercenaries, Spies & Private Eyes who needed information about Victorian London, especially the section listing literary sources.

The only problems Barton found were all production related, noting "Most of the maps are difficult to read, and the reproduced type of the Baedeker is so tiny that in places a magnifying glass might be necessary."