File Extension Library

.GRP File Extension

  • Developer by: Blizzard Entertainment
  • Category: Game Files

What is an .GRP file?

.GRP file extension is created by Blizzard Entertainment. .GRP has been classified as Game Files.

.GRP is StarCraft Graphics Group File

Collection of frame images used for units, weapons, spells, wireframes, and menu graphics within Starcraft; each object may contain anywhere from a few to several hundred frames.

GRP files may be extracted from the .MPQ file. They are referenced by StarCraft, but can be edited with a third-party editor.

List of all softwares that can open the StarCraft Graphics Group File
Blizzard StarCraft
Blizzard StarCraft
File Type 2 SmarterMail Group File
Developer by: SmarterTools Category: Data Files Format: Binary

File created by SmarterMail, an email server application used to host Web email access; stores one day's worth of email messages for a mailbox folder; used for storing a database of email messages for a particular user.

GRP files are created with filenames that reflect the date of the email messages. For example, the file 2011-01-01.grp contains all email message data for January 1, 2011 for a particular mailbox folder. GRP files are saved with a corresponding ".cfg" file, which has the list of all email messages and the GRP file where each message is located.

List of all softwares that can open the SmarterMail Group File
SmarterTools SmarterMail
File Type 3 Windows Program Manager Group
Developer by: Microsoft Category: System Files

Defines a group of programs listed in the Windows Start Menu; i.e. "Main," "Games," "Accessories," or other folder.

If a GRP file becomes corrupt, you can restore it to Windows default settings by using the Program Manager. Select File→Run, then type "setup /p" and press Enter. This will rebuild the GRP file using Windows default settings.

File Type 4 Ken Silverman's Build Engine Group File
Developer by: Ken Silverman Category: Game Files Format: Binary

A GRP file is a game data file used by games that are built with Ken Silverman's Build Engine. Example games include Duke Nukem 3D and Shadow Warrior. GRP files can store various kinds of game data, such as graphics, audio, and map information. They are saved in a simple uncompressed format and therefore can easily be modified to change gameplay.

The group format is an older format and therefore support for it is limited. There are still tools such as kgroup and kextract which can be used for extracting the contents of the files and for repacking the files with updated content. These programs are part of Ken Silverman's Build Engine.

NOTE: Since there are several branches of Ken Silverman's engine, there may be slight variations in GRP files. Therefore, you should look into the group file format documentation for the specific game you have.

List of all softwares that can open the Ken Silverman's Build Engine Group File
Ken Silverman's Build Engine

How to Open .GRP file on different platforms

Open .GRP File on Windows

  • Right-click a .GRP
  • Left-click "Open With" > "Choose another app"
  • Select the program that opens .GRP file and Select check box "Always use this app to open .GRP files" Press "Ok"

Open .GRP File on Mac

  • Right-click (or Ctrl + Left-click) the .GRP file
  • Click "Open With" > "Other.."
  • Then choose another program from the app list and press "Open"
  • Select check box "Turn on" for "Always open in app"

Open .GRP File on Linux

Right click on the .GRP file, choose "Open with" and select a program from the list above

Open .GRP File on iPhone

Select a file. If you don't see an application to open the .GRP file, tap "Share" and choose the right app.
Method 2
Save the file. Then open the app «Files». Touch and hold the file, then release your finger. You will see a black menu bar. After that tap "Share" and select an application.

Open .GRP File on Android

Tap the Settings icon on an Android smartphone, then select «Applications». Click the Settings icon in the upper right corner of the screen, to change the default apps.
If you want to open, edit, save or even convert .GRP files on Android, then your best bet is to download one of the dedicated apps available on Google Play.

How to fix problems with .GRP files

  1. You need to update the application that you normally use to open .GRP files. Only the latest version of the software supports the current .GRP file format
  2. You need to check the .GRP file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)