Home : File Types : REZ File

.REZ File Extension

File Type 1Lithtech Game Engine Resource File

4.3 (1264 Votes)
CategoryGame Files

What is a REZ file?

A REZ file is a resource file used by first-person shooter games that are developed with the Lithtech gaming engine. It contains game content, including meshes, textures, music, maps, and other game objects. REZ files are commonly used to modify game content.

More Information

REZ files are used by the following Monolith games:

  • Aliens vs Predator
  • Aliens vs Predator 2
  • Blood II
  • Condemned 2: Bloodshot
  • Contract J.A.C.K.
  • F.E.A.R.
  • F.E.A.R. 2: Project Origin
  • The Matrix Online
  • Noone Lives Forever
  • Noone Lives Forever 2
  • Purge
  • Sanity: Aikens Artifact
  • Shogo: Mobile Armor Division
  • Tron 2.0
Other examples of games that use Lithtech resource files include:
  • Sierra Entertainment Die Hard: Nakatomi Plaza
  • Jarhead Games Marine Sharpshooter
  • Jarhead Games Marine Sharpshooter 2: Jungle Warfare
  • Jarhead Games World War II Sniper: Call To Victory
  • Valumedia World War II: Normandy
Many REZ files may be modified using Dragon UnPACKer or Game Extractor. They may also be extracted using the program lithrez.exe, which is bundled with many Lithtech games.

NOTE: The Lithtech gaming engine was originally developed jointly by Monolith Productions and Microsoft.

Open over 300 file formats with File Viewer Plus.
Programs that open REZ files
Updated 8/30/2017

File Type 2FirstClass Resource File

4.2 (220 Votes)
CategoryData Files

.REZ File Association 2

Resource file used by OpenText FirstClass, a conferencing and emailing program that enables collaboration and communication between users; contains resources that customize the FirstClass interface; includes pictures, forms, icons, and sounds.

More Information

NOTE: REZ files are similar to .FC files except they only hold resources for the FirstClass interface instead of login data.

Programs that open REZ files
Updated 4/1/2014

File Type 3Escape Velocity Plug-in File

4.3 (121 Votes)
CategoryPlugin Files

.REZ File Association 3

Plugin file used by Escape Velocity or EV Nova, a series of space adventure games by Ambrosia Software; adds new features, such as new ships, planets, and base stations; may also include new storylines.

More Information

REZ files can be viewed and edited with EVNEW, a free Windows utility available on the Ambrosia website. Note that this utility requires Apple QuickTime to be installed.

NOTE: Ambrosia Escape Velocity and EV Nova have been discontinued.

Programs that open REZ files
Ambrosia Escape Velocity
Ambrosia EV Nova
Ambrosia Escape Velocity
Ambrosia EV Nova
Updated 9/13/2019

About REZ Files

Our goal is to help you understand what a file with a *.rez suffix is and how to open it.

All file types, file format descriptions, and software programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

If you would like to suggest any additions or updates to this page, please let us know.