ET: Legacy

A second breath of life for Wolfenstein: Enemy Territory

• Website: https://www.etlegacy.com
• Downloads: https://www.etlegacy.com/download
• Wiki/FAQ: https://github.com/etlegacy/etlegacy/wiki
• Development: https://github.com/etlegacy/etlegacy
• Assets Repository: https://drive.google.com
• Documentation: https://etlegacy.readthedocs.io/
• Lua API: https://etlegacy-lua-docs.readthedocs.io
• Translation: https://www.transifex.com/etlegacy/etlegacy
• Contact: #etlegacy on irc.libera.chat and etlegacy/#etlegacy on Discord.

INTRODUCTION

ET: Legacy is an open source project based on the code of Wolfenstein: Enemy Territory which was released in 2010 under the terms of the GPLv3.

There are two aspects to this project:

• An updated game engine, ET: Legacy, which aims to fix bugs and security exploits, remove old dependencies, add useful features and modernize its graphics while still remaining compatible with ET 2.60b and as many of its mods as possible.
• A new mod, Legacy, which aims to add many useful features and improvements while staying close to the original gameplay, as well as being lightweight and extensible through Lua scripts.

For more information consult our wiki.

CONTRIBUTING

See CONTRIBUTING.

SECURITY POLICY

See SECURITY.

GENERAL NOTES

Game data

Wolfenstein: Enemy Territory is a free release, and can be downloaded from Splash Damage.

This source release contains only the engine and mod code but not any game data, which is still covered by the original EULA and must be obeyed as usual.

In order to run ET: Legacy you will need to copy the original pak0.pk3 assets file to the etmain folder. In addition, third party mods might also require the pak1.pk3 and pak2.pk3 assets files.

Compatibility with Enemy Territory 2.60b

ET: Legacy remains compatible with the ET 2.60b version as much as possible.

Please note that ET: Legacy is not compatible with PunkBuster enabled servers. ET: Legacy clients also cannot connect to servers running the ETPro mod.

Linux 64 bit

Please remember that 64 bit ET: Legacy clients can only connect to servers running mods providing a 64 bit version. You will be able to play 32 bit-only mods only if you compile ET: Legacy on a 32 bit system or cross-compile it for 32 bit architecture on a 64 bit system.

At the moment, only the ETrun, ETJump, N!tmod and Legacy mods are available in 64 bit version, while all other existing mods are available in 32 bit only version. Read more on the Compatible mods wiki page.

In case you are a running a 64 bit system, you probably might want to use the bundled libraries which are located in a separate etlegacy-libs repository and can be automatically downloaded using the git submodule command. See the next section for more details.

DEPENDENCIES

Required:

• CMake (compile-time only)
• OpenGL
• GLEW
• SDL
• ZLib
• MiniZip
• libjpeg-turbo or libjpeg

Optional, enabled by default:

• libcurl
• WolfSSL or OpenSSL
• Lua
• Ogg Vorbis
• Theora
• Freetype
• libpng
• SQLite
• OpenAL

Grab info about current lib versions from our Libs Changelog wiki page.

To get the latest source code install git and clone our repository hosted at Github.com:

$ git clone git@github.com:etlegacy/etlegacy.git

If the required dependencies are not installed on your system run:

$ git submodule init
$ git submodule update

This downloads the essential dependencies into the libs/directory. You can choose whether to use bundled libraries instead of the system ones by changing the BUNDLED_LIBS variable in the CMakeList.txt configuration file. You can then select which bundled libraries to use by toggling the respective BUNDLED_XXX variable.

COMPILE AND INSTALL

To install the binaries system-wide, you need to compile ET: Legacy with hardcoded fs_basepath.

The following variables can be adjusted in CMake:

• INSTALL_DEFAULT_BASEDIR: sets default fs_basepath, i.e. where etl and etlded executables look for data files. In most cases it is CMAKE_INSTALL_PREFIX+INSTALL_DEFAULT_MODDIR. Defaults to empty value, because we want fs_basepath to be the current working directory when not installing the game system-wide.

• (optional) INSTALL_DEFAULT_BINDIR: Location for executables. Appended to CMAKE_INSTALL_PREFIX. Defaults to bin.

• (optional) INSTALL_DEFAULT_SHAREDIR: Location for shared data. Appended to CMAKE_INSTALL_PREFIX. Defaults to share.

• (optional) INSTALL_DEFAULT_MODDIR: Location for libraries and paks. Appended to CMAKE_INSTALL_PREFIX. Defaults to lib/etlegacy and then legacy is appended to it.

• (optional) DOCDIR: Location for documentation. Defaults to INSTALL_DEFAULT_SHAREDIR/doc/etlegacy.

Linux

Install required dependencies.

• option A: easybuild

In terminal, run one of the following:

$ ./easybuild.sh        # for compiling a 32 bit version or
$ ./easybuild.sh -64    # for compiling a 64 bit version

ET: Legacy will be installed in ~/etlegacy.

• option B: command line

In terminal, run:

$ mkdir build && cd build && cmake ..

To compile, run:

$ make

If you wish to install ET: Legacy system-wide, run:

$ make install

Be sure to set the CMake variables (see above) beforehand.

NOTES:

• Even if you have a 64 bit linux distribution which provides 32 bit versions of all the required libraries, you might also need the development libraries (-devel packages) installed on your system.

• In order to compile the jpeg-turbo library properly you will need the nasm assembler.

• On some systems, CMake might have trouble locating 32-bit libraries and tries to use 64-bit ones when building 32-bit. This can be fixed by setting the following enviromental variables before running CMake (note: running easybuild takes care of this for you)

$ export CC="gcc -m32"
$ export CXX="g++ -m32"

# or simply run cmake with
$ CC="gcc -m32" CXX="g++ -m32" cmake ..

Crosscompiling on Linux with MinGW-w64

In terminal, run:

$ mkdir build && cd build
$ cmake -DCMAKE_TOOLCHAIN_FILE=../cmake/Toolchain-cross-mingw-linux.cmake ..
$ make

By default, MinGW name is set to i686-w64-mingw32. You may have to change it in cmake/Toolchain-cross-mingw-linux.cmake depending on how it is called on your system.

Windows

Install:

1. Visual Studio Community with the Desktop Development with C++ workload
2. CMake and make sure it is added to your system PATH

• option A: easybuild

  1. run easybuild.bat

ET: Legacy will be installed in My Documents\ETLegacy-Build.

• option B: Visual Studio

  1. create a build directory inside the directory which contains ET: Legacy sources
  2. open Visual Studio Command Prompt in the Start menu
  3. change directory with cd to the newly created build directory

In the command prompt, run:

$ cmake -G "NMake Makefiles" -DBUNDLED_LIBS=YES .. && nmake

or

$ cmake -G "Visual Studio 16" -A Win32 -DBUNDLED_LIBS=YES .. # Visual Studio 2019
# or "Visual Studio 17" for Visual Studio 2022

and open the resulting project in Visual Studio.

NOTES:

• If compilation of bundled libraries is aborted for any reason, you will probably need to clean the libs directory and start over. This can be done by executing git clean -df && git reset --hard HEAD inside libs/ directory.

• If the build fails during libcurl compilation because of missing sed utility, download it from GnuWin and place it into your system path or copy it into MSVC/VC/bin. It also comes with Git and can be placed into your system path automatically if you select that option during Git installation.

macOS

Install:

1. Xcode:

• At least a recent Version of Xcode Command Line Tools (Terminal -> xcode-select --install)
• or a complete Xcode IDE (through App Store or https://developer.apple.com/xcode/downloads/)

2. Homebrew (https://brew.sh/)

Then brew the following packages in the terminal app:

# all compilation tools needed
$ brew install cmake autoconf nasm automake libtool

# Libraries if you do not wish to compile and use the provided sources (BUNDLED_LIBS)
$ brew install glew sdl2 minizip jpeg-turbo curl lua libogg libvorbis theora freetype libpng sqlite openal-soft

Alternative way to install the dependencies is to run

$ brew bundle
$ brew bundle --file=misc/macos/libs.Brewfile

Depending on what brew version you're using (mostly older ones), you have to specify brew install --universal to get both 32bit and 64bit libs. If it throws an error, just use the command listed above. Although your system curl library supports both architectures, you also need to install its headers.

• option A: easybuild

There are many flags and options provided by easybuild.sh. The ET: Legacy version you can compile depends on the used macOS version.

If you're running up to macOS 10.14 (Mojave), use one the following flags in Terminal.app:

$ ./easybuild.sh        # for compiling a 32 bit version or
$ ./easybuild.sh -64    # for compiling a 64 bit version

This will put an 'etlegacy' folder with the selected arch into your user folder.

With macOS 10.15 (Catalina) and above, your only option is to compile and run a 64 bit client. Therefore you need to use the following flags:

$ ./easybuild.sh -64 --osx=10.15    #watch out for the double dash at --osx !

Take a look into easybuild.sh for more information and further options/flags.

• option B: command line

In terminal, run:

$ mkdir build && cd build && cmake ..

Look into easybuild.sh for all available CMake options.

To compile, run:

$ make

If you wish to install ET: Legacy system-wide, run:

$ make install

Be sure to set the CMake variables (see above) beforehand.

NOTES:

• In the legacy mod folder, the cgame_mac and ui_mac files are redundant since they are in the mod .pk3 and will be extracted at runtime, so you can delete those. The client is named "ET Legacy.app" (and can safely be renamed), while the dedicated server is just a command-line binary named "etlded".

Raspberry Pi

ET: Legacy supports both OpenGL and OpenGL ES on the Raspberry Pi.

Tested devices: 3B+, 4B.

Required dependencies

$ sudo apt-get install build-essential libfreeimage-dev libopenal-dev libpango1.0-dev libsndfile-dev libudev-dev \
libasound2-dev libjpeg8-dev libwebp-dev automake libgl1-mesa-glx libjpeg62-turbo libogg0 libopenal1 libvorbis0a \
libvorbisfile3 zlib1g libraspberrypi0 libraspberrypi-bin libraspberrypi-dev libx11-dev libglew-dev libegl1-mesa-dev \
nasm autoconf git cmake zip gcc g++ libtool libxrandr-dev x11proto-randr-dev

On the Pi 3B+, it is advised to add a slight overclock to the GPU to provide a better experience. Run sudo nano /boot/config.txt and add the following to the config file:

core_freq=500
v3d_freq=500

You may be able to increase the overclock more than this, but increasing too far will be unstable and will likely crash your Pi. If you experience crashes whilst having the overclock in place, decrease the values accordingly.

Pi 3B+ install instructions

Install using experimental OpenGL driver:

1. Enable experimental OpenGL driver via the raspi-config command line application.
2. Modify easybuild.sh and set the FEATURE_RENDERER_GLES flag to 0 under the RPI section.
3. Increase GPU memory split to at least 256mb.
4. Run ./easybuild.sh -RPI -j4 to build for Raspberry Pi.

Install using OpenGLES:

1. Ensure the legacy OpenGL driver is enabled via the raspi-config command line application (it is by default).
2. Modify easybuild.sh and set the FEATURE_RENDERER_GLES flag to 1 under the RPI section.
3. Increase GPU memory split to at least 256mb.
4. Run ./easybuild.sh -RPI -j4 to build for Raspberry Pi.
5. Exit X11 to terminal in order to enable hardware accelerated rendering.

Pi 4B install instructions

The OpenGL driver used is the Fake KMS driver and currently both OpenGL and GLES are ran within an X11 session. If you want to switch between OpenGL and GLES when installing ET: Legacy on the Pi 4, simply set the FEATURE_RENDERER_GLES flag to 0 or 1 under the RPI section within the easybuild.sh script.

LICENSE

ET: Legacy

Wolfenstein: Enemy Territory GPL Source Code Copyright (C) 1999-2010 id Software LLC, a ZeniMax Media company.

OpenWolf GPL Source Code Copyright (C) 2011 Dusan Jocic

XreaL GPL Source Code (renderer2) Copyright (C) 2010-2011 Robert Beckebans

ET: Legacy Copyright (C) 2012-2023 ET:Legacy Team mail@etlegacy.com

ET: Legacy is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

ET: Legacy is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with ET: Legacy (see COPYING.txt). If not, see https://www.gnu.org/licenses/.

ADDITIONAL TERMS: The Wolfenstein: Enemy Territory GPL Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU GPL which accompanied the Wolf ET Source Code. If not, please request a copy in writing from id Software at id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

EXCLUDED CODE: The code described below and contained in the Wolfenstein: Enemy Territory GPL Source Code release is not part of the Program covered by the GPL and is expressly excluded from its terms. You are solely responsible for obtaining from the copyright holder a license for such code and complying with the applicable license terms.

MD4 Message-Digest Algorithm

Copyright (C) 1991-1992, RSA Data Security, Inc. Created 1991. All rights reserved.

License to copy and use this software is granted provided that it is identified as the "RSA Data Security, Inc. MD4 Message-Digest Algorithm" in all mater ial mentioning or referencing this software or this function.

License is also granted to make and use derivative works provided that such work s are identified as "derived from the RSA Data Security, Inc. MD4 Message-Digest Algorithm" in all material mentioning or referencing the derived work.

RSA Data Security, Inc. makes no representations concerning either the merchanta bility of this software or the suitability of this software for any particular p urpose. It is provided "as is" without express or implied warranty of any kind.

MD5 Message-Digest Algorithm

The MD5 algorithm was developed by Ron Rivest. The public domain C language implementation used in this program was written by Colin Plumb in 1993, no copyright is claimed.

This software is in the public domain. Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, without any conditions or restrictions. This software is provided "as is" without express or implied warranty.