EDGE

EDGE (Enhanced Doom Gaming Engine) is a collaborative Open Source project based upon the Doom source code. EDGE is derived from an earlier project called DOSDOOM. The latest version of EDGE is 1.29 Release Candidate 1, released on March 14, 2005.

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, Windows, Linux, BeOS and Mac OS X. It has both software-rendered and OpenGL hardware-accelerated versions; as of version 1.29 beta 1 and beyond, however, it no longer updates support for the software mode, as the team decided that working on two separate versions of the same port was too time consuming.

The current EDGE team consists of Andrew Apted and Andy "darkknight" Baker as the primary developers, and Marc A. "Fanatic" Pullen and Luke "lobo_eire" Brennan as Distributors/Promoters.

Features

 * Support for up to 64 defined weapons at once.
 * 16 Ammo types: BULLETS, SHELLS, ROCKETS, CELLS, and AMMO5 to AMMO16.
 * Extrafloors feature allows modders to create submergible 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 of both existing Doom levels and newer levels.
 * Weapons can have secondary attacks, or can even be used as healing items.
 * Support for MUS, MIDI, CD, and Ogg Vorbis music formats.
 * DDF files allow the editing of many features (such monsters, attacks, and levels).
 * Sprites can be viewed from 16 angles (see Sprite).

Popular add-ons
EDGE also brings its own unique set of popular add-ons to the Doom community. Although some dislike EDGE for its perceived instability, the following mods have in one way or another made their mark on the community.


 * Don's Challenge &mdash; Created by Cory Whittle, Don's Challenge is a 3-episode modification based around the supernatural adventures of Don P. Tello, a veteran cop who is summoned into Hell by Mortis, the incarnation of Death, to challenge thousands of hellspawned creatures that his soul might be deemed worthy by her as a vessel. At the end of Episode 1, 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 vengeance for the deaths. This mod became popular due to the use of new monsters, weapons, and levels. One weapon (cigarettes) could even be used to heal the player. Another weapon (Booze) could be used to increase armor value, but took away a small portion of health as well. As of now, only one episode is fully released, but Episode 2 is reportedly on the way.
 * Immoral Conduct - Created by Cory Whittle, Immoral Conduct is a weapons modification for both EDGE and ZDoom (although the ZDoom version does not have as many features as its EDGE counterpart). The EDGE version contains 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 (summons helper turrets to attack enemies), Gas-Powered Chainsaw, Remote/Proximity Satchel Charges, and Marking/Visibility Flares. New items included a 50% medikit and Nightvision Goggles. New helper monsters included the Marine Corporal and Marine Private. Monsters have also been modified (for example, the Baron of Hell's blood is green), and shells are ejected from weapons. It is a partial conversion, sometimes mistaken for 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."


 * Covert Ops &mdash; an EDGE version of Twilight Warrior. It has many features, such as new weapons and interesting scripts.


 * QDoom (Quake Doom) &mdash; This modification uses graphics and enemies from Quake.


 * EBDoom (Earthbound Doom) - Created by Baron of Sigma, this modification has generated mixed opinions. It is not a complete game, and many consider it more of a "monster modification" since roughly 100+ different species of monsters exist, most of them imported and emulated from Heretic, Hexen, Duke Nukem 3D, Shadow Warrior, and Blood, and 'evolved' versions of existing game monsters, such as Chainsaw Zombies, Gold Liches, and Elder Mancubi. The game also appears to use a near-perfect emulation of the Sigil from Strife as an easter egg weapon. In addition, the player has hit points instead of a health percentage, and can take much more damage than the common version of Doomguy. There are also several 'helper' characters based on the heroes of many of the Doom-engine games, including Doomguy, Corvus, and the player classes in Hexen. Certain bosses are also among the few in many modifications to have over 50,000 HP, and some are believed to reach 700,000 or more HP. The weapons are more 'mystical' and energy-based, with few traditional Doom-style weapons; a healing weapon and even a shield-like weapon exist. Another unique feature in EBDoom is that all melee attacks used either by the player or other monsters/allies can inflict "critical hits" up to 4x damage at times, as in an RPG. Despite the community's mixed opinions of the mod, it is often used as a resource wad by other modders who want to quickly import foreign monsters into their own mods (as the author appears not to mind this). It is also one of the three games in the Doom community to use Hissy as a central plot player, and makes many references to another EDGE mod known as Cacodemon Squad. The mod has not been updated in almost a full year.