Popular games built on game engine ZDoom

The Sigil Megawad is free download created by John Romero for the original 1993 Doom. It contains nine single-player and nine deathmatch levels. The free megawad will be released in mid- May 2019 and requires players own the original 1993 registered version of Doom in order to play. The SIGIL Megawad is the spiritual successor to the fourth episode of Doom, and picks up where the original left off.

In development since 2010, the 18th Cacoward winner and Moddb 2012 MOTY Editors Choice of Creativity Award Brütal Doom takes Doom into a whole new level. It makes the game much more violent than before. There's much more blood, plus it adds unique gibs, death animations, dismemberments, headshots, executions, fire and explosion particles, flares, and much more. The whole world becomes more real and interactive.You can kick severed limbs and heads (and sometimes, use it to activate some traps in the map earlier, or even kick them against enemies to do some damage), you can shoot enemies' heads to deal more damage (and cause more gruesome deaths) you can destroy most things in the the scenario (trees, lamps, hanging bodies, etc), you can paint the floor, the walls, and even the ceiling with blood, you can push the explosive barrels to make traps, or grab them and use like an explosive weapon, you can silently take down enemies from behind and perform stealth kills, the chainsaw actually cuts the enemies in two. When you find the berserk pack and get super strength, you can perform cinematic executions and RIP AND TEAR your foes with your bare hands. Some enemies will scream in anguish and try to crawl away when near death, and they can be used as human shields, and much, much more. Everything in Brutal Doom is extremely intense. Everything sounds louder, looks bigger, moves faster, and hits harder. You can even fell the impact of explosions. Enemies are harder and smarter, and weapons and explosions are much louder. Your weapons have been upgraded to a deadly arsenal, completely throwing the vanilla Doom's "progressive weapon system" through the window. Every weapon is powerful and have it's pros and cons, a a weapon will never be outclassed when you find a new weapon, but only find a different use for different situations, making Brutal Doom more balanced and more strategic than Vanilla gameplay. You have new abilities too. With any weapon selected, you can press Q (default bind) to kick enemies at close range and send them away. Every new feature and weapon is cautiously balanced, and added in a way that makes sense in the universe of Doom. Many of the features can also be disabled/enabled to provide the best personal experience possible.

Grezzo 2 is a first-person shooter video game developed by Italian game designer Nicola Piro and released in 2012. The game is a total conversion modification of the 1993 video game Doom and its development began in the early 2000s, with the version called Grezzo 1, when Nicola Piro attended high school. The plot follows the adventure of pagan farmer Piro which, annoyed and disgusted by Christianity, plans to kill Jesus Christ to prevent the rise of his religious phenomenon. Gameplay requires the player to face various levels, defeating enemies and bosses and using a wide range of weapons. Many well-known personalities of the culture of Italy appear in the game, as well as references to extremely satirized social, political and religious issues of the country. Following the 2012 release, Grezzo 2 received significant attention, both inside and outside of its country of origin, due to its extremely blasphemous, vulgar and violent content.

The City of the Damned is a single-level PWAD for Doom II that requires the ZDoom source port. It was designed by Daniel Gimmer (Tormentor667) in 2004, last updated in 2005, and uses an unnamed music track by Lexus Alyus. The par time defined in MAPINFO is 23:15. In 2020 it received a v2.0 update for GZDoom, and a sequel called The City of the Damned: Apocalypse was released in 2007.

Reelism is a tongue-in-cheek variation on the "invasion" gameplay. It offers large, wide-open maps in which random monsters and weapons will constantly spawn during themed rounds. The "reel" mechanism also provide other game-changing effects which can help or, usually, hinder the players. Everything is filled with homages to classic gaming, in-jokes, and all-around silliness. The extreme randomness of the mod makes the gameplay rather unpredictable, since it is possible to obtain extremely unfair combinations as well as ridiculously easy ones.

MassMouth is an alien from the planet Zeeble (a zeebloid). He has a small, green body with a large mouth. MassMouth is an employee of The Worm, a rich alien with his own personal moon. The Worm employs MassMouth to bring him various valuable items. MassMouth is very well-paid and has his own personal room.

Pogostick was a ZDoom total conversion mod intended to transform it into a 2D platformer in the vein of Commander Keen. It has since been abandoned, but playable builds are still available.

Phobos Mission Control is a single Doom level for limit-removing ports created in 2016 by John Romero as a second warm-up exercise before working on a new FPS game, Blackroom. It is an alternate take on E1M4: Command Control.

Saturnine Chapel, also known as MNENMA 0 is a single-level PWAD for Doom II that requires a Boom-compatible source port to play. It was designed by Darryl Steffen (dobu gabu maru) and uses the music track "Egypt," by Zachary Stephens (Ribbiks). It received one of the 2017 Cacowards.

A fast paced gameplay mod for the original Doom games, created by TerminusEst13, revolving heavily around melee combat

While driving in the middle of the night, a mysterious figure in the dark wanders into the path of your car, making you turn and crash into a wall, having no way back you begin searching for help, but only for you to find a psychotic infestation...

Harmony is a 11-level stand-alone total conversion, created by Thomas van der Velden (t.v.) and released after five years of development. In its updated 1.1 version, it is recognized as an IWAD by ZDoom 2.4.0 and newer. The soundtrack consists of three songs from Kyū's album "The Edge" (2009), specifically track #6 ("Untitled", used on MAP02, MAP03, MAP10 and MAP11), #7 ("Mercury Stripes, Blue Mess", used on MAP01, MAP04, MAP05, MAP08 and MAP09) and #10 ("The Edge", used on MAP06, MAP07, and the intermission, endgame and title screens). James Paddock (Jimmy) later created an optional MIDI pack providing a new, original soundtrack composed specifically for Harmony.

A standalone freeware First-Person Shooter powered by ZDoom.

Mayhem Mansion is a Doom total conversion project (and standalone on gamejolt) developed by Darsycho. It is inspired by an obscure FPS game known as "Exploding Lips" and uses many resources from the game.

An influential Doom megawad known for its detailed and challenging level design. Alien Vendetta (aka AV) is a megawad that contains 32 new and hard levels. The levels are full of details and monsters. It is also one of the few PWADs that are allowed to be used in Compet-N speed runs. There have been two separate releases of Alien Vendetta. The second release, made when it was selected for usage on Compet-N, made various changes to almost all of the levels; the biggest change is the replacement of MAP25: Valley of Echoes with another map, MAP24: Clandestine Complex, as well as the relocation of the former MAP24: Demonic Hordes to MAP25.

ECWolf is an advanced source port for Wolfenstein 3D, Spear of Destiny, and Super 3D Noah's Ark based off of the Wolf4SDL code base. ECWolf pulls a substantial amount of code from ZDoom and aims to provide a wide array of mod editing capabilities without the need to modify the source code. For players, ECWolf provides many useful features such as better control binding, support for wide screen resolutions, and unlimited save slots.

Chex Quest 3 is the newest edition to Chex Quest, a series of comedic sci-fi shooter games. It contains slightly updated versions of the maps from Chex Quest and Chex Quest 2, in addition to new maps.

Action Doom 2: Urban Brawl is a computer game released in September 2008 which runs using the ZDoom source port. It was mainly developed by Stephen Browning, with ACS scripting by Mike Watson and James Bauer. It is the prequel to the 2004 total conversion Action Doom, but has a different gameplay style. Whereas the original Action Doom was a sidescrolling shoot 'em up using Doom's first-person perspective, Action Doom 2 instead simulates a beat 'em up.

Scourge of Viscerus is 7-level hub-based mod for Hexen. It was created by Matt Tropiano (MTrop) and released on July 1, 2010. Set several years after the defeat of the Deathkings, the players must venture out to stop a demon named Viscerus, who seeks to resurrect them in order to conquer the world of Cronos. Scourge of Viscerus features new boss enemies and new music tracks.

Daedalus: Alien Defense is a 32-level megawad released in 2003 by TeamTNT as a sequel to Icarus: Alien Vanguard. Originally developed as "Doom 2000", it was the first ZDoom mod created by TeamTNT.

Cold as Hell is a total conversion for Doom II set in a fictional military research facility in Greenland in the 1950's.

The independent video game Delaweare is a free ZDoom based first person shooter in which the emphasis is put on visual and audio experiences. The aim of the game is to explore its strange world to collect all music tracks.