EDGE

EDGE (Enhanced Doom Gaming Engine) is a collaborative Open Source project based upon the [Doom source code]. EDGE derived from an earlier project called DOSDOOM.

The most attractive feature of EDGE is its DDF system. DDF describes all game behaviour inside text files external to the executable file. As a result, it is popular among modders who use the extensibility to add many new weapons and features with many fewer of the limits present in other source ports. With DDF, for example, it is possible to create monsters which can possess multiple missile and melee attacks, or create custom pain and death states for monsters when hit by specific weapons or projectiles.

EDGE includes ports to many popular Operating Systems, including MS-DOS, Microsoft Windows, Linux, BeOS and Mac OS X. It has both software-rendered and OpenGL hardware-accelerated versions, however as of 1.29 Beta 1 and beyond, it no longer updates support for Software mode, as the team decided that working on two separate versions of the same port was too time consuming.

The current EDGE teams consists of Andrew Apted(Ajapted), and Andy Baker(darknight) as the primary developers, and Marc A. Pullen(fanatic) and Luke Brennan(lobo_erie) as Distributors/Promoters.

Features

 * Support for up to as many as 64 defined weapons at once
 * 12 Ammo types: BULLETS, SHELLS, ROCKETS, CELLS, PELLETS, NAILS, GRENADES, GAS, DAGGERS, ARROWS, TORPEDOS [sic] and CRYSTALS.
 * Extrafloors feature allows modders to create submergable liquids, Room-over-Room, or catwalks, as well as vertically moving platforms not embedded into the floor.
 * Four armor types: GREEN(33% Reduction), BLUE(50% Reduction), YELLOW(75% Reduction) and RED(90% Reduction)
 * GL Nodes allow better 3D Rendering on existing Doom levels and newer levels
 * Weapons can have Secondary Attacks, or can be even used as healing items.
 * Support for MUS, MIDI, CD and Ogg Vorbis tracks in game
 * DDF files allow editing of several features, such as monsters, attacks, levels, and more

Popular Add-ons
EDGE also brings it's own unique set of popular add-ons to the Doom community. Although some dislike EDGE for it's partial unstability, the following mods have in one way or another made their mark in the community.

Don's Challenge - Created by Cory Whittle, Don's Challenge is a 3-episode modification based around the supernatural adventures of Don P. Tello, a veteren cop who is summoned into Hell by Mortis, the incarnation of Death, to challenge thousands of hellspawned creatures, for his soul to be deemed worthy by her as a vessal. At the end of episode one, Don transforms Mortis into a cat, however her brother Fate summons Mortis to Hell and takes Don with her. In the third episode, Don and Mortis return to Earth, only to find it overrun by Demons, and Don's own family dead. Don and Mortis attempt to take vengence for their deaths. This mod was considered popular due to the use of monsters, new weapons, and levels. One weapon, the Cigarettes, could even be used to heal the player. As of now, only one part is fully released, and Part 2 is supposably on the way.

Immoral Conduct - Created by Cory Whittle, Immoral Conduct is a weapons modification that exists for both ZDoom[although not as many features as it's EDGE counterpart] and EDGE. The EDGE version contained the following: Knife, .45 Pistols, Stock 12g Pump Shotgun, Customized Pump Shotgun[fires 'slasher rounds'], 12g Hand Cannon, 9mm Uzi SMG, Fragment Hand Grenades, 40mm Grenade/Tear Gas Gun, Assault Rifle with M203, Infantry Rifle with Bayonet, Minigun, 12g Sawed-off Shotgun, Beretta 9mm Pistol, Chrome Magnum Revolver, Sentry Turret Kit[summoned helper turrets to attack enemies], Gas-Powered Chainsaw, Remote/Proximity Satchel Charges, and Marking/Visiblity Flares. New items included a 50% medikit, and Nightvision goggles. New helpers included Marine Corporal, Marine Private. Monsters also have more modifications, such as Baron of Hell bloodsplats being green, or shells that are ejected from Shotguns for example. It is a Partial Conversion, sometimes mistaken as a Total Conversion, and in Whittle's words, "With my stuff, you have all the millions of user made Doom and Doom II levels at your disposal to be enhanced with new weapons and items."