E3M4: All the Marbles (Serenity)

E3M4: All the Marbles is the fourth level of Serenity. It was designed by Bjorn Hermans and Holger Nathrath, and includes a custom music track.

Walkthrough

 * Letters in italics refer to marked spots on the map. Sector numbers in boldface are secrets which count toward the end-of-level tally.

Secrets

 * 1) (sector 11)
 * 2) (sector 12)
 * 3) (sector 53)
 * 4) (sector 54)
 * 5) (sector 101)
 * 6) (sector 102)
 * 7) (sector 125)
 * 8) (sector 127)
 * 9) (sector 128)
 * 10) (sector 130)
 * 11) (sector 131)
 * 12) (sector 174)
 * 13) (sector 175)

Bugs
Engine versions prior to v1.666 can display a minor HOM as the red door is opened.

Four of the secrets are unreachable; as a result, only 69% Secrets is possible.

Current records
The records for the map on the Doomed Speed Demos Archive are:

Things
This map contains the following numbers of things per skill level:

Inspiration and development
An early version of this map appeared as part of the collection "Nathrath's Fab Four" (NATHRATH.WAD).