MAP33: CyberSweeper (Eternal Doom)


Eternal Doom bonus maps

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Secret maps: 31 32
Bonus maps

This level occupies the map slot MAP33. For other maps which occupy this slot, see Category:MAP33.

MAP33: CyberSweeper is the bonus level of Eternal Doom. It was designed by Jim Flynn and uses the music track "Cyber Hunt". It is contained in a separate WAD file CSWEEPER.WAD, which must be loaded along with ETERNAL.WAD. It occupies the MAP01 slot.



CyberSweeper is a Doom-styled recreation of the prominent puzzle video game Minesweeper. It features a six-by-six board with a number of cyberdemons distributed on it instead of mines. There is an additional outer ring of squares, making the total grid eight by eight. This outer ring is full of blank squares that give the player the initial hints they need to solve the puzzle, rendered as transparent linedefs that indicate the number of adjacent cyberdemons with digits on their middle textures. Pressing the use key while against a square will lower it, revealing either another hint and a health bonus or a cyberdemon. Every safe square must be cleared in order to finish the level. Successfully clearing all non-cyberdemon squares grants access to a teleporter that allows you to telefrag the still-resting cyberdemons.

If played on top of Eternal Doom without using the shell, the level will have only eight cyberdemons in a fixed arrangement. The Eternal Doom package includes an utility, RANCY.EXE, which can be used to randomize the cyberdemons' placement for each subsequent playthrough. This program runs whenever Cybersweeper is played through the Eternal Doom shell. Additionally, your choice of skill level through the shell determines how many cyberdemons are placed on the board: eight for ITYTD, twelve for HNTR, fourteen for HMP, sixteen for UV, and eighteen for NM.


Default solution. X marks the cyberdemon.

Open the double-doors on all four sides of the map to reveal a chaingun, super shotgun, rocket launcher, and plasma rifle with a good portion of ammo. These armaments should give you some leeway if you make a mistake and reveal a cyberdemon. Use the hints given to clear the squares, leaving the trapped cells alone. When you grab every health bonus from the safe squares, a door to the northwest will open. Walk through to trigger a series of teleports and telefrags, killing all cyberdemons, afterward depositing you back at the exit.

Areas / screenshots[edit]


As this level does not contain official secrets, the NM 100S category is redundant.

Routes and tricks[edit]

Current records[edit]

The records for the map at the Doom Speed Demo Archive are:

Run Time Player Date File Notes
UV speed
NM speed
UV max
UV -fast
UV -respawn
UV Tyson
UV pacifist

The (absence of) data was last verified in its entirety on December 21, 2021.


Player spawns[edit]

This level contains eight spawn points:

  1. facing north-west. (thing 78)
  2. facing north-east. (thing 79)
  3. facing south-west. (thing 80)
  4. facing south-east. (thing 81)
  5. facing south-east. (thing 82)
  6. facing south-west. (thing 83)
  7. facing north-west. (thing 84)
  8. facing north-east. (thing 85)


Map data[edit]

Things 109
Vertices 1084*
Linedefs 914
Sidedefs 1723
Sectors 125
* The vertex count without the effect of node building is 830.


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

External links[edit]