Opening a GRP File

The GRP file type is primarily associated with Duke Nukem 3D.

GRP	File extension: GRP
	File type:	game archive file

What is a GRP file

GRP files mostly belong to Duke Nukem 3D by 3D Realms. The GRP file extension is associated with multiple file formats and the most popular one of them is used by the StarCraft program. It is a popular strategy game that uses the GRP file format to collect and sort image frames related to the game in a structured form.

Main Usage: Each GRP file stores objects containing one or more image frames that are implemented by the program to save units, weapons, wireframes, menu graphics, spells, etc. The data is dynamic as it changes while the user plays the game.
Associations:
- SmartMail Group File: GRP file extension is also associated with an email server application, SmartMail. It is a database-like file, which stores email messages of each day for the user. And hence, the files are named as the dates.
- Program Manager Group File: The GRP file extension is also used by Windows Program Manager. This file format is used to define a set of programs which appear on the Windows start menu.
- Build Engine Group File: The GRP file format is also used by game files associated with games developed by Ken Silverman's Build Engine to store graphic and map information.

How can I open a GRP file?

You need a suitable software like Duke Nukem 3D to open a GRP file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your GRP file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a GRP file directly in the browser:. Just drag the file onto this browser window and drop it.

Online GRP File Viewer

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How to extract texts from GRP files or capture a screenshot to PDF, JPG, DOCX, TXT, ...

If you want to extract texts from GRP file or capture a screenshot, you can use our free Online GRP File Viewer:

Just click the "Choose your .grp file to view" button on this page.
Your GRP file will then be displayed in the browser.
Now click on "Save as..." at the top of the page.
Then choose the file format (e.g. JPG, PDF, DOCX, TXT, ...) you want.
Download the converted file.

Programs that open and convert GRP files:

Duke Nukem 3D by 3D Realms
See the previous paragraphs to learn more about the main application. GRP files are often referred to as Duke Nukem 3D games because this type of file is primarily created or used by this software.
Act! (group data file) by Act!
Act! is a customer relationship management (CRM) software. It allows users to keep track of client and prospect details by maintaining a database that can be shared by multiple users. The software was previously developed by Sage. A GRP file stores group data for Act!. This file format is classified as Data. Related links: Act! on Wikipedia, Act! Forum Discussion About GRP Files, Act! Introduction Video, Act! Review
BPM Studio (title information file) by Alcatech
BPM Studio is an audio software for use by DJs. A GRP file stores all title information for a major category of the File Archive in BPM Studio. This file format is classified as Misc. Related links: BPM Studio Manual, Article Mentioning GRP Files in BPM Studio, BPM Studio Installation and Interface Video, BPM Studio on CNET, BPM Studio Review
Build Engine (game archive file) by Ken Silverman
Build Engine is a game engine developed by Ken Silverman. GRP (group) files are archive files that store resources and data for games built using this engine. This file format is classified as Game. Related links: Build Engine on Wikipedia, Build Engine FAQs, GRP Format Wiki, GRP File Extractor, Interview of Developer
DESQview by Quarterdeck
DESQview is a text mode multitasking program for Microsoft MS-DOS and other operating systems in the DOS family. It was developed by Quarterdeck and has been discontinued. GRP is a file format associated with DESQview. Related links: DESQview on Wikipedia, DESQview FAQs, DESQview Video, DESQview on WinWorld, DESQview in Business Software
PixBase Pictures Group
Shadow Warrior (game archive file) by Flying Wild Hog
Shadow Warrior is a first-person shooter game developed using the Build Engine from Ken Silverman. GRP (group) files are archive files that store resources and data for games built using this engine. This file format is classified as Game. Related links: Shadow Warrior, Shadow Warrior Thread Mentioning GRP Files, Shadow Warrior Playthrough
SmarterMail (SmarterMail group file) by SmarterTools
SmarterMail is a business email server from SmarterTools. A GRP (group) file in SmarterMail stores all the emails received during a particular day. This file format is classified as Data. Related links: SmarterMail Introduction, GRP and EML Files in SmarterMail Help Article, SmarterMail Forum Discussion About GRP Files, SmarterMail Video Tutorials, News Report About SmarterMail
Starcraft Archive (StarCraft graphics group file) by Blizzard Entertainment
StarCraft is a military science fiction real-time strategy game from Blizzard Entertainment. A GRP (group) file stores multiple frames of graphics for the game. This file format is classified as Game. Related links: StarCraft on Wikipedia, GRP Format Description, GRP File Tutorial, Library for Converting Images in GRP Files to Common Image Formats, StarCraft Playthrough
Windows (Windows Program Manager group) by Microsoft
Microsoft Windows is an operating system from Microsoft. Windows Program Manager Group Converter (GRPCONV.EXE) is a tool in Windows that converts Program Manager groups to folders when Windows is upgraded. The files that store a Program Manager group have the GRP extension. Another tool in Windows associated with managing GRP files is PROGMAN.EXE. This file format is classified as System. Related links: Windows on Wikipedia, Introduction to GRPCONV.EXE and GRP Files, GRPCONV.EXE in Microsoft Forum, PROGMAN.EXE and GRP File Description, Tutorial Mentioning PROGMAN.EXE and GRP Files

GRP file format:

Each file has a definite file format, that is, how the stored data is arranged in the file. The file format can be deduced from the file extension and the signature. File extension, signature and file format must match; otherwise errors will occur when the file is opened. Knowledge is power - this also applies when dealing with unknown or faulty files. Our examination of the GRP files comes to the following conclusion:

You will often come across the GRP file type. This is used by a few programs, each with its own file format. The following file formats are most commonly found in GRP files:

20% of all GRP files are based on the popular config file format. A configuration file is used by computer software to store settings. It consists of a text-based content with a structure and syntax comprising key–value pairs for properties, and sections that organize the properties. These files are text files, so they contain words and text. The file size is in the range of 1 KB to 2 KB. The file type was developed only in the last few years. The files contain the following words: # Mailing List file, ; Enabled = Y, ; SendReminders = N, ; Private = N, ; AllowExpn = N, unisco, ; ListNameInSubject = Y, ; HideFromAddressBook = Y, RewriteFromDMARC and ; HideFromAddressBook = N. Such files sometimes refer to unisco, logisticsteam, hayward, mpbpo, sbfreight and jetson.
20% of all GRP files use the same file format, which can be identified by the letters "GRP" at the beginning. These files are binary files, so they do not contain text, but only cryptic characters. The files are 81 KB to 35 MB in size, with a median of 5 MB. The keywords GRP2 are typical for these files. assets.grp is a typical file name. These files are attributed to models, props, weapons, ayumi, constructor and common.

The remaining 60% of all GRP files are files with no common format, the following 13 formats exist: Build Engine GRP container, Windows Program Manager Group, MSX BASIC Graphics bitmap, ZIP, XML, FPRG, data, ONO and RGrp. These files sometimes refer to duke, avenger, astro, drivers, cabins, levels or maps. If you want to find out what your GRP file contains, drag and drop it onto this page.

Technical Data for GRP File Extension

File classification:

Game

Related files:

gpr, index, qrp, bin, dll, dat, con, avc, prg, grb, gpg, grf, off, txt, sdr, bank, log, dds, art, pak

Mime type:

text/plain, application/octet-stream

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: MSProgramGroup, FileType: Microsoft Program Group, AppName: Windows Progman Group Converter
EXEFile: grpconv.exe

ProgramID: MSProgramGroup
EXEFile: %SystemRoot%\system32\grpconv.exe %1

ProgramID: MSProgramGroup
EXEFile: D:\WINDA\System32\grpconv.exe %1

ProgramID: ACT!.Database
EXEFile: %ProgramFiles%\ACT\act.exe %1

ProgramID: MSProgramGroup
EXEFile: %SystemRoot%2\system32\grpconv.exe %1

ProgramID: MSProgramGroup
EXEFile: D:\WINXP\system32\grpconv.exe %1

ProgramID: MSProgramGroup
EXEFile: C:\WINXP\system32\grpconv.exe %1

ProgramID: MSProgramGroup
EXEFile: %SystemRoot%.0\system32\grpconv.exe %1

ProgramID: DUP5.Files
EXEFile: %ProgramFiles%\Dragon UnPACKer 5\drgunpack5.exe

ProgramID: MSProgramGroup
EXEFile: %SystemRoot%\SysWow64\grpconv.exe

ProgramID: MSProgramGroup
EXEFile: %SystemRoot%.1\System32\grpconv.exe

ProgramID: MSProgramGroup
EXEFile: %SystemRoot%1\system32\grpconv.exe

ProgramID: MSProgramGroup
EXEFile: %SystemRoot%C\system32\grpconv.exe

Show all 13 listings To Top

a grp game archive file is a special file format by 3D Realms and should only be edited and saved with the appropriate software.

How to solve problems with GRP files

Associate the GRP file extension with the correct application.
Update your software that should actually open game archive files. Because only the current version supports the latest GRP file format. Search, therefore, e.g. on the 3D Realms manufacturer website after an available Duke Nukem 3D update.
To make sure that your GRP file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .GRP file online - secure, fast, and no downloads needed.