Object "34": Sonar

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Object "34": Sonar
Title screen
Author Lainos
Port Limit-removing
Year 2011
Link Doomworld/idgames
This level occupies the map slot MAP01. For other maps which occupy this slot, see Category:MAP01.
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Object "34": Sonar is a single-level PWAD for Doom II, meant for limit-removing ports that was released on December 31, 2011 by Lainos. Set in a massive underwater station amid a communications blackout, Object "34" is the last entry in a series of maps created by Lainos, which began with Object "32" in 2008 and continued in Da Will's MAP10: Object "33" in 2009.

Custom things[edit]

The mod comes with a series of sprite replacements, including a fish that replaces the Wolfenstein SS and swims in indestructible tanks. Most notably, Commander Keen has been replaced by the Vortex Queen from the Ecco the Dolphin series.


Map of Object "34": Sonar
Letters in italics refer to marked spots on the map. Sector, thing, and linedef numbers in boldface are secrets which count toward the end-of-level tally.


Other points of interest[edit]


  1. In the first big room, head northwest, then open the northwest room to get a computer area map. (sector 2832)
  2. In a north-south hallway near the center of the facility with six lights on the ceiling, enter the side room at the east side and step on the pedestal. Afterwards, return to the hall and head west into a small corridor. Look north through the fence and shoot the switch. After shooting it, leave the corridor to the west and head all the way north to the door. Enter the next room, and in the room past that, head east and enter the teleporter. This takes you to a secret place where you can get armor bonuses, a stimpack, boxes of rockets, and a soul sphere. (sector 2301)
  3. In the large room with the super shotgun surrounded by seaweed, head to the northwest corner and use the metal wall that looks different. This is a secret trap room with a backpack. (sector 3250)
  4. At the southwest part of the waterway, go across the large water platform to the southwest and go through the black wall. Follow the path to get a soul sphere. (sector 327)
  5. Head east from the southwest waterway and into a room where there are crushers on the south wall. Approaching the wall near the east end reveals a lift behind the last crusher. Go there and take another lift to reach the southeast part of the map. (sector 2380)
  6. In the hall southeast of the central water fountain that goes up and down, jump west off the ledge and into a well with a megaarmor (green armor on Hey, Not Too Rough or lower). (sector 1125)
  7. Use the central water fountain that goes up and down to jump west into the area at the west side. Open the wall next to the yellow bar at the north wall to get armor bonuses and a megaarmor. (sector 1500)
  8. In the huge area at the north end of the facility, head up to the southwest ledge and follow the outer wall to a switch. Flip it, then return to the red key area. Enter the corridor at the east side and flip the switch there, then head north. Jump to the east and go to the northeast corner to get a megaarmor. (sector 2967)
  9. In the northwest corner of the facility, approaching the west switch reveals two closets to the north and south. Enter the closet to the north before it rises and open the east wall to get a soul sphere. (sector 4371)
  10. From the room with the super shotgun surrounded by seaweed, enter the middle structure and raise a bridge to the northeast. Open the red bars beyond the bridge, then take the lift down. Go across the gap to the east and press the switch above you at the east side. After doing this, head back to that small gap and use the switch to the south. This will unlock a path leading west to a soul sphere. (sector 3172)
  11. Head south from the dark intersection and head to the southernmost wall in the next room. Use it, then head north to the lowering wall to get a blur artifact. (sector 4287)
  12. In the U-shaped hall at the northeast end, head to the four switches at the east side and flip the switch on the west wall. Head west to get a blur artifact. (sector 233)


Demo files[edit]

Areas / screenshots[edit]


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
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist

The (absence of) data was last verified in its entirety on December 6, 2021.


Map data[edit]

Things 4606
Vertices 27888*
Linedefs 32838
Sidedefs 56742
Sectors 5412
* The vertex count without the effect of node building is 27888.


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

Technical information[edit]

Inspiration and development[edit]


See also[edit]


External links[edit]