Doom 3 The Lost Mission (mod)

Mod logo, based on the artwork of the original.

Doom 3 The Lost Mission is a vanilla Doom 3 modification which ports the new campaign from Doom 3: BFG Edition, The Lost Mission, back to the original release of Doom 3 from 2004. The mod is managed by Arl and was initially released in 2019.

Changes

• Improved presentation with reworked intro and ending cinematics.
• Values of items, ammunition and stats as in the original game.
• Voices and audio logs can be better heard, unlike in the BFG Edition where ambient sounds make audio logs difficult to hear.
• Player model and armor item model now correspond to Bravo Team marines.
• Deleted or altered several clip brushes so the player is less restricted in the map (the player can now jump over railings to their death).
• Fixed many map issues, such as areas where the player could get stuck, textures, and visual glitches.
• Underground 2 sentry bot now activates its flashlight when entering its route.
• No armor-mounted flashlight.

Technical

The mod requires Doom 3's final v1.3.1 patch, and also requires the Resurrection of Evil expansion to be installed, since it serves as the base game for The Lost Mission. An officially supported version of the game code is available for use with the dhewm3 source port, and a third-party port (currently unsupported) to CstDoom3 has been completed as well.

Update history

v1.1

Released August 26, 2019.

• Fixes several sound problems
• Makes the player start the campaign with half the health (as in the original version)
• Adds Spanish strings and voices along with strings for German, French, Italian and Japanese languages.

v1.2

Released April 21, 2020.

• Added missing sounds
• Fixed, improved and expanded localization.
• All sounds have been revised and converted properly.
• Intro text font is now like the original BFG Edition version.
• Added missing models.
• Rechecked all maps and fixed texture/light/brush/AAS/entity/collision issues.
• Removed all check points and achievement entities.
• (Underground 1/2 map) Added a light models that were previously rendering like black boxes due to the model absence.
• (Underground 2 map) Added a flashlight to the sentry bot, as sentry bots in regular Doom 3 tend to have.
• (Underground 2 map) Fixed the cave chamber where the player could not return from because of a cave model blocking the entrance.
• (Underground 2 map) Fixed some big pipes that weren't touching the ground and were floating in a pit (issue present in the original version).

v1.3

Released December 1, 2020.

• Fixed final boss's projectiles not having particles when colliding with things.
• Fixed not being able to call a new sentry bot if the first one dies in map 'le_underground2'.
• Fixed missing pipe in the first level.
• Fixed file cabinet model rendering black.

v1.4

Released November 1, 2023.

• Fixed language folder structure which caused problems using other languages.
• Fixed several map issues regarding textures, lights, models and item placement.
• Fixed several audio issues regarding missing sounds.
• Fixed vertically stretched and out of sync video transmission in Enpro1.
• Improved presentation with tweaked intro and ending cinematics.
• Added Dr. Meyers' original animations from BFG Edition, and made him an actual NPC which looks at the player while talking.

v1.5

Released February 16, 2025.

• Fixed Soul Cube, enables playing in Nightmare difficulty mode just as in the base game.
• Fixed progress bar in loading screens not working.
• Restored original pipe models in Enpro1 starting room.
• Fixed items falling under geometry in Hell.
• Fixed over bright glass windows at the start of Exis1.
• Fixed "fix me" date in Bob Thompson's PDA.
• Fixed some small technical stuff.
• Fixed some small texture stuff.

External links

• ModDB homepage
• dhewm3 support information
• GitHub repository of CstDoom3 port, by James Haley (Quasar) (manual assembly is currently required).