REZ File Extension

REZ file icon

Lithtech Game Engine Resource Format

What is a REZ file?

The REZ file extension is linked to Lithtech Game Engine Resource Format and belongs to the categories of Compressed Files and Game Files, which include 2085 files.

The Lithtech Game Engine Resource Format (REZ) was developed by Monolith, which created file format and 11 programs to work with them.

REZ files are supported by Windows. To extract a REZ file, you can choose from 12 programs such as Dragon UnPACKer, ZipZag and Aliens versus Predator 2.

File Signature

HEX code: 52 65 7A 4D 67 72 20 56 65 72 73 69 6F 6E 20 31 20. ASCII code: RezMgr Version 1 Copyright (C) 1995 MONOLITH INC..

How to open a REZ file?

If you cannot open a REZ file, it is most often due to missing software. Select a program from the list according to your operating system. Then go to the official website of the program developer, download it, and install it on your device.

Dragon UnPACKer, ZipZag and Aliens versus Predator 2 stand out as the preferred programs to manage REZ files effectively. To install the current version of ZipZag, go directly to the official Valentin website. The universal package for all operating systems is available there.

After successful installation, your operating system should seamlessly handle REZ files via ZipZag.

Set ZipZag as the default REZ program

Change Default Program on Mac

  1. Right click or Control + left click on the desired REZ file;
  2. Choose "Open in Application" and click "Other";
  3. Go to the lower section of the window, where you will find the "Enable" menu. By default, it is set to "Recommended Programs";
  4. Select "All Programs" from this menu and proceed to search for ZipZag. Check the box next to "Always open in app" to set it as the default option.

Set default programs for Windows

  1. Start by right-clicking on your REZ file, then select the "Open with" option and choose "Choose another app" from the menu that appears;
  2. In the pop-up window, select the ZipZag application;
  3. Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening REZ files.

Solve problems with REZ files

REZ files may present some challenges, but most can be easily addressed with minor software tweaks. See the troubleshooting tips below for guidance.

What are the ways to check if my REZ file is damaged?

REZ compressed files that have become corrupted may display one or more of the following symptoms:

  • The file does not respond or shows errors when opening it;
  • The file stops responding or freezes in ZipZag or other programs;
  • Unexplained REZ file size inflation;
  • Actions performed on the file result in the appearance of error notifications;

Why does ZipZag crash or shut down frequently?

Insufficient updates for Valentin products can cause ZipZag to crash. Be sure to regularly install the latest software updates.

Restarting your computer will solve many common problems, which is why it’s the first thing you should do before changing any settings related to the software.

Is there any specific software or utility that can help repair a damaged REZ file?

Use a recovery program to open the damaged REZ file, and in the menu, click "Repair" to start the repair operation. Wait for the recovery process to finish, allowing automatic repair of damaged compressed files.