The Doomsday Engine is an enhanced DOOM source port for Windows, Mac OS X, and various Unix platforms. It is based on the source code of id Software's DOOM and Raven Software's Heretic and Hexen.

The purpose of the project is to create a modular game engine with which classic 2.5d first person shooters such as DOOM, Heretic and Hexen can be played. We aim to retain the same feel as the original games but leverage modern techniques such as 3D graphics and client/server networking. A lot of emphasis is placed on good-looking graphics.


Our modular design separates game logic from the renderer, audio, network and other such subsystems. This allows the engine to be used with game logic modules (plugins).

The Doomsday Engine can be run on all modern Windows operating systems and the same auto-install package is used on both 32bit and 64bit variants.

Installation:

Once downloaded, run the install package and follow the on-screen instructions to complete the install.

Minimum System Requirements

Windows XP, Vista or 7 running DirectX 8 (or later).
Display adapter capable of 3D hardware acceleration using OpenGL.
Original game data files for each supported game that you wish to play (e.g., in the case of DOOM the only file needed is doom.wad).
Some Add-ons may require a large amount of disk space (especially high quality texture and music packs).



Features

Cross-platform. Supported platforms include: Windows, Linux and Mac OS X (10.4 or later)
Open source. Software developers should visit the SourceForge project page for more information
Hardware-accelerated OpenGL graphics engine
3D positional audio for sound effects (not supported by all audio plugins)
16-player client/server networking via TCP/IP with Multiplayer menu for game setup
Graphical Control Panel for configuration, accessed quickly with Shift-Escape
In-game console for modifying settings and giving commands using a command line interface
Configurable player controls (bindings) and input manipulators (smoothing, look spring etc...)
Plain-text definition files for game data such as thing types and states, sound and music information, map configuration and more

Renderer

3D models: Quake's MD2 format and Doomsday's DMD format with LOD support
High-resolution textures (PNG, TGA, PCX) and detail textures
Map lighting emulates the effects of radiosity for a more natual appearance (FakeRadio: shadows in corners)
Smooth movement of objects, world structures and the camera. The original games were limited to the maximum framerate of 35 FPS
Colored, dynamic lighting for world surfaces, 3D models, sprites and particles
Object shadowing effects
Particle generators for special effects
Decoration effects on world surfaces: light sources and particle generators
Lens flares and glowing objects
Support for skyboxes and 3D sky models

Audio

EAX and A3D environmental sound processing effects
Upsampling of sound effects

History

The Doomsday Engine and the associated ports of DOOM, Heretic and Hexen have been under development since May 1999, when the project was started by Jaakko Keränen (skyjake). The first version of the engine, called JHexen at the time, was released on November 1st, 1999. Ports of Heretic and Doom followed in early 2000.