Victory screen of CleimosVictory screen of Cleimos
Authors Rand Phares, Steven Phares
Port Vanilla Doom
Year 1994
Link Doomworld/idgames

Cleimos is a Doom episode replacement mod of nine levels, created by Rand and Steven Phares. It has a sequel made for Doom II, called Cleimos 2.

This episode appears on Maximum Doom as CLEIM102.WAD.


The plot revolves around a mercenary, called "Nuts" Kelton, hired to shut down the corrupted systems of a combat training center belonging to the Cleimos Corporation where the VR holograms somehow took physical life and started killing everybody. It just so happens that the holograms had been designed after the demons from Doom...


Built-in demos[edit]

This WAD features three built-in demos, of which the third one covers an original Doom level. All require Doom v1.2 to view them. The demo levels are:

Demo Level Skill Tics Length
DEMO1 E2M3: Torment 4 13273 6:19.23
DEMO2 E2M6: Veil of Blood 4 9495 4:31.29
DEMO3 E3M6: Mt. Erebus 4 764 0:21.83


Current records[edit]

The DSDA episode records for Cleimos are:

Run Time Player Date File Notes
UV max episode 1:17:08 Michael Novikov 2003-07-30

The data was last verified in its entirety on July 28, 2022.


  • The release package of Cleimos contains an editing utility, called CLEIMSET.EXE. This will make a copy of DOOM.EXE version 1.2 and then changes the automap level names and end-episode text strings. It then renames the new executable to CLEIMOS.EXE. It utilizes the GO32 DOS extender, a copy of which called GO32.EXE is included. CLEIMSET.EXE itself is made with DJGPP. It will leave DOOM.EXE intact.
    • As CLEIMSET.EXE only works on version 1.2 of DOOM.EXE utilizing similar functionality to DeHackEd's DoomHack feature, a patch called CLEIMOS.DEH was made in 2003 by Miguel Folatelli (myk) to emulate the functionality of the executable.
  • The release package of Cleimos includes the Dshrink utility to compress the SIDEDEFS lump.

See also[edit]

External links[edit]