You are part of the CIA's U.S. Protection Agency. Your the guy who saves the U.S. government from those hostile terroist groups. The CIA section your assigned to, MERC "Major Endagerment Restraining Crew", is always ready for a good fight.

May 31st, 2012
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Has level texture and sprite fixes, crash fix and 2 miscellaneous fixes.

== MERC 2 v1.1 Patch ==
== Installation Readme ==

Date: 7/19/99
Author: Heyyo (Ryan Conner)

1. Installation
2. Usage
3. Troubleshooting
4. Technical Support
5. Version History

1. Installation
To Install the MERC 2 v1.0 --> v1.1 patch follow these steps:

** You MUST have MERC 2 v1.0 installed for this to work **
1) Download this patch from
2) Unzip into the Duke3D directory that contains
MERC 2 v1.0 (Overwriting any files that already exist)
3) Run MERC 2 like you normally would with Merc2.exe
and M2dos.bat

2. Usage
After Installing this patch, you just run MERC 2 like you
did before.

3. Troubleshooting
MERC 2 doesn't work at all!

Possible Causes:
MERC 2 is for Duke Nukem 3D v1.4/1.5 ONLY.
It will not work with any other version.

Make sure you installed MERC 2 and the v1.1 patch directly
into your DN3D directory.

Do NOT run MERC 2 using a Duke3d.exe or Duke3d.grp that has
been modified in any way.

I get a "Program Requires MS-DOS Mode" pop-up box, or the game
crashes during certain levels when running M2 through Windows.

Possible Causes:
Windows will suggest using Real DOS Mode when it encounters
files that it thinks are too big to handle through a Win/DOS
session (i.e. large midi files).

To prevent this, use the procedure below for each of the
following files: Duke3d.exe, Setup.exe, M2dos.bat

Right click on the file, click on Properties, click on the
Program Tab, then click the Advanced icon. Uncheck the box
containing the text: "Suggest MS-DOS as necessary", and check
the box containing the text: "Prevent MS-DOS-based programs
from detecting Windows".

The game crashes when loading certain levels.

Try using the above information on preventing Dos programs from
detecting Windows. If problems still exist, try turning off the
music, this will fix the problem 99% of the time. You can then
turn the music back on after the level loads.

If all else fails, run M2 in "Real Dos mode".

4. Technical Support
If you still encounter problems with v1.1 even after using the
above information, please consult our Game Play/Technical forum
at: Or send e-mail to:

5. Version History
V1.1 Multiplayer Fixes
- Fire on item respawn
- Disintegration gun crash
- Added Smoke1 spawn to Elec gun death sequence
- Added Co-op and DM starts to all maps

Crash Fixes
- Fixed E1L4 & E2L3 crash problems

Level Texture/Sprite Fixes
-E1L1 - TV texture mess-up (man, how did I miss that?)
-E1L2 - Some sprites/textures added
-E1L4 - Some sprites/textures added

Misc. Fixes
- Civilian 4 code now works properly
- Updated both launchers to use new .grp file

V1.00 Initial Release.

Preview Image
Merc 2 1.1
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Release Date
Released 1997
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