Design Your Own Mission (ALPHA V6) (NEW!)

"Welcome to the next generation of GTA3 Mission mods."

"Design your own Mission" for Grand Theft Auto 3 game.

Version: 1.0.5.1.alpha.pre-release
Written by Seve267.
Date created: @2025-2026
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* This is the first In-Game Mission builder Mod in GTA3 *
** This is a Recreation project of DYOM mod from GTA San Andreas and recreated it to the GTA3 game. **

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Credit to the most inspired DYOM Creators and Developers:

@Dutchy3010, @PatrickW and @MiranDMC.
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NOTE
*This is a alpha release version, some features are not available in this version,
and the alpha/pre-release created missions may not work in the final release*

# OVERVIEW
DYOM (Design your own Mission) is a GTA mod that allows the user to create, build, share and design their own missions in-game

without writing a single line of SCM script.



* Enhanced DYOM editor (vs. original DYOM)
* Fast objective processing (vs. original DYOM)
* And more.


##MISSION/EDITOR FEATURES (for this current version v1.0.5.1)

Limits:
* 99 Objectives
* 99 Actors
* 99 Cars
* 49 Pickups
* Text input char limit: 59 chars



Objective types:
* Checkpoint > with customizable checkpoint radius and colors.
* Actor > Single enemy gang group only
* Car > Enter car only
* Pickups > Single counting only, and single parameter value system.
* Player teleport > with customizable properties.



Other features in this mod:
* Support customization of Mission name/Author name text
* Objective text support
* Actor animations, Actor type properties, Actor weapon system.
* Basic car creation setup
* Mission Save/Load operations.



Hotkeys:
* Y - DYOM Menu
* CTRL+SHIFT+Q - Start/Abort Mission
* F4 - Refresh all mission elements to update


###REQUIREMENTS FOR THIS MOD
* CLEO 2.1.1+ Plugin for GTA3


####RECOMMENDATIONS
* Disable any WidescreenFix mods to Fix DYOM Menu UI Issues.
* The Sprint key should be mapped to the SPACE key


#####INSTALLATION OF THE MOD
(For those who had installed modloader plugin, follow these steps)
1: Copy the "gta3_dyom_v1.0.5.1" folder, and paste it into the "modloader" folder
2: Copy all the contents inside the "userfiles" folder, go to your "My documents" folder,
and paste all the contents into the User files folder (like this: "GTA3 User files"),
3: Then, run GTA3 and start the game.



(For those who had NOT installed modloader plugin, follow these steps)
1: Create a backup copy of "main.scm" file from "GTA3\data" directory (in case when you restore the original "main.scm" file)
2: Open the folder "gta3_dyom_v1.0.5.1", copy the "main.scm" file, go to the GTA directory (where the "GTA3\" directory),
Open the "data" folder, then paste the file "main.scm" file inside of the folder. (make sure you have a backup copy of the orignal "main.scm" file)
3: Copy all the contents inside the "userfiles" folder, go to your "My documents" folder,
and paste all the contents into the User files folder (like this: "GTA3 User files"),
4: Then, run GTA3 and start the game.



*Take note: CLEO 2.1.1+ plugin is required to run this mod, so you must download the plugin from the website: CLEO Library*


######TROUBLESHOOTING
Common issues:
* If you get teleported to another island, the game crashes:
For this version, this issue is unsolved for unknown reasons.



* Missing "gta3dyom_main.mdb" file:
Check that "gta3dyom_main.mdb" file is in the userfiles directory,



* DYOM Menu background is bad:
Disable any WidescreenFix mods to fix this issue.


Changelog for 1.0.0-Alpha6

- Objective type Pickup is finally fixed, with counter display support.
- Added new feature: New objective type "Cutscene".
- Added new feature: Actor route point system. (unlocked animId's: -1, -2)
- Added new feature: Object mission element feature.
- Added new feature: New Mission editor tools: Noclip Added new Mission editor hotkeys: * TAB+T - Toggles the Noclip/Airbreak mode.
- Player model skin selection implemented. Special actor model skin support (modelId: 1000 ~ 1040)
- Text input can now be max up to 99 characters.
- Mission file structure has changed.
- Backwards compatibility for Alpha 5.X DYOM UI update: Fixed game freeze bug when the default menu theme has loaded, background issue. - Default theme is now a default configuration from user setting file.
- Motion blur overlay returns on Editor mode. Updated Mission objectives behaviours.
- Fixed crah for Timeout objective setup.
- MDB file Updated.