Frequently Asked Questions

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Q: Where can I get a copy of Duke Nukem 3D to run EDuke32?

A: At this time, your only option is to scour used game resellers for a copy of the original DOS release. Alternatively, you can use the one episode shareware version which is available from 3D Realms for free. While the source code to Duke Nukem 3D has been released to the public under the GNU General Public License, the game's content (artwork, sounds, maps, et cetera) remains a commercial product. DO NOT post anywhere or ask anybody at all about where to acquire this game illegally. Support 3D Realms for making the most awesome game ever and don't be a pirate, yarrr!

Q: When launching EDuke32, I get an error about a missing file called 'GAME.CON' or 'EDUKE.CON'. Help!

A: It would appear that you haven't placed a copy of 'DUKE3D.GRP' from your Duke Nukem 3D or Duke Nukem 3D: Atomic Edition CD into your EDuke32 directory. Once you place 'DUKE3D.GRP' into the same directory as 'eduke32.exe', the game should launch and run fine. You may also use the shareware version's 'DUKE3D.GRP' as well. If you're sure you've put 'DUKE3D.GRP' in the right place but you still get this error, your GRP file is likely corrupt and will need to be re-copied off of your CD.
Here is a picture of what the startup window looks like with several different GRP files available and the DukePlus mod selected. Note that the shareware version and the original, non-Atomic Edition version of the game have both had their GRP files renamed; all versions of Duke Nukem 3D ship with a GRP file named 'DUKE3D.GRP'

Q: What is the 'Game' section of the startup screen used for?

A: The 'Game' section is a feature that allows you to select which GRP file you would like to play. The GRP files must exactly match the versions found on their respective CDs, without any modifications. The following games are supported:
  • Duke Nukem 3D Shareware Version
  • Duke Nukem 3D Mac Shareware Version
  • Duke Nukem 3D
  • Duke Nukem 3D: Atomic Edition
  • NAM (Note: you must rename GAME.CON from NAM to NAM.CON)
  • Napalm (Wal-Mart only version of NAM, some .GRP differences between the two releases)
  • WWII GI (Limited Support using NAM mode as a base)
You can also use the startup window to select a third party mod to play.

Q: When I am playing EDuke32 with 16-, 24-, or 32-bit color, everything has a blue tint! How can I fix this?

A: Unfortunately, most people who run into this error are out of luck, especially those with an Intel or SiS video chipset. There are a few things you can do to try and fix this problem:
  • Open the console and type "r_redbluemode 0"
  • Download the newest drivers for your graphics card
  • Delete the texture cache
  • Try the most recent build of EDuke32
The following driver vendors have been blacklisted in the newest versions of EDuke32. If you have a video card or driver from one of these companies, OpenGL modes will not be available:
  • Microsoft (default OpenGL ICD which comes with Windows)
  • SiS
  • 3Dfx
OpenGL can still be enabled for these cards by setting the BUILD_FORCEGL environment variable before running EDuke32, or by using the command line eduke32 -forcegl. It should be noted, however, that the results will probably be less than satisfactory. If you have a blacklisted driver but EDuke32 seems to run fine using BUILD_FORCEGL, please enter the glinfo console command and send us your eduke32.log so that we can add an exception for your video card/driver combination.
Note: Intel video cards are no longer blacklisted.
Note2: Some recent (G33 for example) Intel graphics cards work with OpenGL mode if texture compression is disabled (r_texcompr "0", see settings.cfg configuration file).

Q: How do I play Duke Nukem 3D's various add-ons, like Duke It Out in DC, Life's a Beach, Nuclear Winter, etc?

A: See the Official Add-on Installation Guide.

Q: How can I play multiplayer on the Internet or my LAN using EDuke32?

A: See the Multiplayer page.

Q: Where is my "eduke32.log" and what is it used for?

A: The "eduke32.log" file is generated each time you run eduke32.exe. (mapster32.exe has a separate one titled, "mapster32.log")
You can find both of these files in the same directory where your "eduke32.exe" and "mapster32.exe" is located. Having "Hide extensions for known file types" (Tools, Folder Options, View) unticked will help you locate it easier.
What is the log used for?
  • Helping the EDuke32 developers and other helpful community members locate problems with a users EDuke32 if he or she is having trouble getting it to run, as the log file will 99% of the time indicate what is not working correctly plus many other various things that help developers and modders all around.
Where should I paste my log or URL?
Note: If you are having problems with Mapster32 you should do the same as above but replace "eduke32.log" with "mapster32.log"

Q: If in system international properties system language is not English then symbol keys on keyboard is not work (Mac OS X). So I can't play the game. And I don't want to switch system language because I'm living in Russia.
    [followup Q: is there an OSX API call to set the keyboard layout per-process? If you're knowledgeable in OS X, please let the developers know!]

Q: What the heck are these new-fangled '.7z' files?

A: Introduced in 1999, the 7-zip format offers better compression ratios than traditional .zip files, saving us space in storing our builds and saving you time in downloading them. Thanks, 7-zip! See the 7-zip site [1] for a great, free tool to extract them.

Q: What are the checksums, sizes, and timestamps for the various files that EDuke32 can use?


File Name Size (Bytes) Timestamp (Y/M/D) CRC-32 MD5 Hash Sum SHA-1 Hash Sum
DUKE.RTS v0.99 175,567 1995/12/18, 13:47:30 6148685E 7ECAF2753AA9CC924F746B3D0F36E7C2 A9356036AEA01583C85B71410F066285AFE3AF2B
Shareware DUKE3D.GRP v0.99 9,690,241 1996/01/05, 12:48:08 02F18900 56B35E575EBA7F16C0E19628BD6BD934 A6341C16BC1170B43BE7F28B5A91C080F9CE3409
Shareware DUKE3D.GRP v1.0 10,429,258 1996/01/29, 13:00:00 A28AA589 1E57CF6272E8BE0E746666700CC0EE96 7D2FDF1E9F1BBCE327650B3AECDAF78E6BBD6211
Shareware DUKE3D.GRP v1.1 10,442,980 1996/02/20, 13:10:00 912E1E8D 9B0683A74C8BF36BF85631616385BEC8 5166D6E4DBBA2B8ABB2FDA48257F0FCBDBF17626
Shareware DUKE3D.GRP v1.3D 11,035,779 1996/04/24, 13:30:00 983AD923 C03558E3A78D1C5356DC69B6134C5B55 A58BDBFAF28416528A0D9A4452F896F46774A806
Shareware DUKE3D.GRP v1.5 Mac 10,444,391 C5F71561 B9CAC374477E09459A313CEA457971EA F035E9F0615E3DB23D2DB4C90232D8A95B5B9585
DUKE3D.GRP v1.3D 26,524,524 1996/04/19, 08:30:00 BBC9CE44 981125CB9237C19AA0237109958D2B50 3D508EAF3360605B0204301C259BD898717CF468
DUKE.RTS v1.0/1.1/1.3D/1.4/1.5 188,954 1996/04/19, 08:30:00 504086C1 9D29F9673BBDB56068ACF7645C13749C 738C7F5FD0C8B57EE2E87AE7A97BF8E21A821D07
DUKE3D.GRP v1.5 (Atomic Edition) 44,356,548 1996/12/11, 07:50:00 FD3DCFF1 22B6938FE767E5CC57D1FE13080CD522 4FDEF8559E2D35B1727FE92F021DF9C148CF696C
DUKE!ZON.GRP v1.3D 26,135,388 1997/01/30, 08:46:58 82C1B47F C960FE3CC6920369EB43A8B00AC4E4EE 169E9E2BEAB2E9FF6E0660FA3CE93C85B4B56884
DZ-GAME.CON v1.3D 99,967 1996/12/19, 03:50:56 F3DCF89D 65C72C2550049D7456D5F983E0051E7B 8D05E4646DFBD201877036F5379534D06E6A6DDC
DZ-DEFS.CON v1.3D 28,959 1997/01/30, 11:28:22 F2FE1424 45DDEB920FF7AF450CD6A19CDFF6EE7E 7BA88D2B12F5F193DA96822E59E5B7EE9DABFD5C
DZ-USER.CON v1.3D 36,237 1997/02/11, 08:47:42 93401EA4 A81793173C384F025768ED853A060F3A 1E37C7EB9EAB03C938B18B3712DAEF97BA9B9B13
DUKE!ZON.GRP v1.4 44,100,411 1997/01/30, 08:41:16 7FB6117C 031C271C689DD76F9E40241B10B8EBA9 86A58754A2F2D95271B389FA2B8FAC9AA34CCFCE
DZ-GAME.CON v1.4 151,198 1996/12/19, 14:52:28 5C0E6CC7 8EF020D2F63C0EE1CC391F00FEEE895D D6DC4C24EC5986C7AC8FB3F4DA85D97E06D72F2E
DZ-DEFS.CON v1.4 36,038 1997/01/30, 11:29:18 85847E24 8C7A4622A71F580B57954CA129B0474B D23A2E9CC0FF30B02911AC9D7EC49D55CE856EE0
DZ-USER.CON v1.4 45,037 1997/02/11, 08:48:04 739BE376 1862C4CD17B6C95942B75F72CEAC7AEA 31E39D7BB9E7E77E468CC67684F41AA58238179A
DUKEDC13.SSI v1.3D 7,926,624 1997/02/21, 11:55:30 A9242158 D085D538A6BF40EBB041D964787A5D20 66A96327EC514710D3526D87259CF5C0ABBBB841
DUKEDCPP.SSI v1.4 8,225,517 1997/02/21, 11:57:08 B79D997F F0BFA5B956C8E3DBCBA1042118C1F456 30D6AA2A44E936D09D6B423CFAB7C0595E2376F9
DUKEDC.GRP (Atomic Edition) 8,410,183 A8CF80DA 8AB2E7328DB4153E4158C850DE82D7C0 1B66C3AD9A65556044946DD1CA97A839FCFEDC3B
NWINTER.GRP 16,169,365 1997/12/15, 14:12:48 F1CAE8E4 1250F83DCC3588293F0CE5C6FC701B43 A6728F621F121F9DB02EE67C39EFDBB5EEA95711
VACA13.SSI v1.3D 23,559,381 1998/01/09, 12:50:06 4A2DBB62 974616FC968D188C984E4F9A60F3C4BE 2B7779AB211FB21CD2D7DEF93E2B9BBF948E406F
VACAPP.SSI v1.4 22,551,333 1998/01/09, 12:51:16 2F4FCCEE 540AFD010435450D73FA3463437FCFC9 58FD872BE376957D63D9F5C3BD169D5FCDF28664
VACA15.SSI v1.5 22,521,880 1998/01/09, 12:51:56 B62B42FD 22C8CD6235FC2B7ECEFEFC2442570D68 84945D64E246E91840A872F332494D8509B66DD9
VACATION.GRP (Atomic Edition) 22,213,819 18F01C5B 1C105CED73B776C172593764E9D0D93E 65B8B787616ED637F86CFCAA90DE24C8E65B3DCC
NAPALM.GRP 44,365,728 1998/06/02, 05:41:52 3DE1589A D926E362839949AA6EBA5BDF35A5F2D6 9C42E7268A45D57E4B7961E6F1D3414D9DE12323
NAPALM.RTS 564,926 1998/04/28, 11:25:58 12505172 D571897B4E3D43B3757A98C856869ED7 C90B050192030FFBD0137C03A4181CB1705B95D3
NAPALM.CON (GAME.CON) 142,803 1998/05/13, 06:31:10 75EF92BD CCBBB146C094F490242FD922293DD5F9 46F3AE2B37983660835F220AECEEA6060C89F2A7
NAM.GRP 43,448,927 1998/06/02, 11:13:04 75C1F07B 6C910A5438E230F85804353AC54D77B9 2FD12F94246FBD3014223B76301B812EE8341D05
NAM.RTS 564,926 1998/04/28, 16:25:58 12505172 D571897B4E3D43B3757A98C856869ED7 C90B050192030FFBD0137C03A4181CB1705B95D3
NAM.CON (GAME.CON) 142,803 1998/05/13, 11:31:10 75EF92BD CCBBB146C094F490242FD922293DD5F9 46F3AE2B37983660835F220AECEEA6060C89F2A7
WW2GI.GRP 77,939,508 1999/03/02, 13:30:58 907B82BF 27E927BEBA43447DB3951EAADEDB4709 FD0208A55EAEF3937C126E1FFF474FB4DFBDA6F5
WW2GI.RTS 259,214 1999/02/19, 18:17:18 79D16760 759F66C9F3C70AEDCAE29473AADE9966 CE352EF4C22F85869FDCB060A64EBC263ACEA6B0

The link below also provides all other known CRCs for Duke Nukem 3D GRP files:


Q: I can't pan with Shift+KP5+KP<whatever> in 3D mode.

A: This is an issue with modern keyboards and happens because some key combinations are "dead" (See [2] for an overview and [3] for a technical explanation). There are various workarounds. One is to alias some key to the KP5 key with the goal of finding one for which all key combinations will be passed to the OS. To do that, you need to edit the remap line at the end of mapster32.cfg. A suggestion is to map the KP0 key to KP5. Another way to solve the issue is by finding a keyboard from circa 1996 (one with a big 5-pin connector). Newer revisions of Mapster32 also let you to use Alt instead of Shift in these situations.

Q: Why is aiming at objects so imprecise?

A: The issue occurs only with the Polymost renderer and has its cause in the way it determines the aimed-at object: based on the mouse position on the screen, it constructs a direction vector and calls hitscan. Both steps are a cause of imprecision. The classic BUILD and the Polymer renderers determine the aimed-at object (roughly) by querying what object was drawn at the mouse position, and thus are pixel-perfect. If you prefer to use Polymost, try avoiding aiming at objects at the border of the screen and looking up or down, since the aiming method is particularly ill-behaved in these cases. *update: actually it's a bug that need to be fixed some time.