Modifications

Unofficial

A Modification or MOD is an alteration to a game. Grand Theft Auto modifications are created by fans after the game's release, and are not supported nor endorsed by Rockstar Games. Modifications can be obtained from many Grand Theft Auto websites and fansites.

Almost all modifications are entirely free, and may be downloaded and used by anybody. However, there are restrictions on editing and distributing the modification, so always ask permission from the author.

Modifications are mainly only used on PC versions of Grand Theft Auto games. There are methods of modifying console versions, but these are complex and usually break the license agreement of the game and the game console.

Different Types of Modifications
Modifications in special websites usually are distributed on several categories, depending on aspect of the game they change:

Maps - Modifications of this type add buildings, islands, towns and other objects to an existent landscape of the GTA game. They consist of the added model description with corresponding textures and collision data. Examples are the Pleasure Island mod for GTA Vice City and the WTC Modification for GTA San Andreas. Some modifications of this type come with their own objects in the form of model and texture files which the player must import into the IMG archive of the game for it to work properly.

Missions - Modifications of this type alter or replace the mission script (main.scm in all of the 3D Universe games) of a GTA game. These could alter details of missions or even add entirely new missions. The mission script file is responsible for what-happens-when, so modifying it can achieve almost any effect.

Patches (Fixes) - Modifications of this type do not change anything appreciable but only correct errors present in the original GTA game, like the DFT30 missing it's rear wheel in GTA San Andreas and the wrong placed Cuban Outfit in GTA Vice City. Some of modifications attempt to restore hidden features in game: Ghost Town in GTA III, scenes for adults in GTA San Andreas.

Player - Modifications of this type change the protagonist model in the game, add or replace available clothing items, and sometimes also offer new animations or voice data for the player character. Creation of modifications of the given type began after release of the GTA III, the first GTA game that contained an appreciable protagonist model. Pedestrians modifications also often appoint to the given category.



Vehicles - Modifications of this type add new cars, boats, planes & helicopters to a GTA game, or change existent vehicle colors and handling, sometimes even replacing certain cars with a new hi-poly modeled and textured version of them. These are the most popular kind of modifications (as also the lungs for realization), often united in large thematic packages. Entire communities have built up on San Andreas Multiplayer and Multi Theft Auto based around certain mods, such as modern airliners and warplanes.

Weapons - Modifications of this type alter weapon models and data, such as accuracy, rate of fire, or the sound of shooting. They are usually provided as thematic packages.

Gameplay - Sometimes known as script mods, these mods change the way players play the game. These mods usually have their own custom script but don't interfere with the main.scm script file. Script mods are also sometimes known as "for fun" mods because they are often used to spawn so-called "myths" in certain places, give players special weapons, the ability to control the weather, etc. Script mods usually start the player off with maxed-out muscle, a wad of cash, all cities/bridges unlocked and sometimes with an entire arsenal of weapons to use.

Graphics - Often similar to player skin mods, and map mods, graphics mods, change the skin, or texture, of a game element, such as water, or landscape textures. Graphics are commonly attached to Map mods, although single Bitmap (.bmp) files extracted from a game texture can be replaced with a custom one. Major graphics mods fix lighting effects in the game to make it more realistic. Sprite effects like fire, smoke, or even the HUD can be changed via graphical modifications. Modifications to the weather cycle can also be considered as graphical modifications.

Text - This kind of modification involves altering the text files (american.gxt), changing the ingame texts like instructions, item names, game menu, or even translating the game into other languages.

Some modifications encompass many of these features at once - these are known as Total Conversions (TCs). TCs generally change everything in that GTA game, including the map, vehicles, pedestrians, players and missions. A few TC mods been made, and there have been many more planned that have never reached a release. Most TCs made for GTA San Andreas. That is explained by the time of occurrence of ready tools for development in all aspects and growth of a community. Examples are the notorious Grand Theft Auto: Great Britain, Grand Theft Auto: Criminal Russia and GTASA: Liberty City, which is still in development for Grand Theft Auto: San Andreas, and the fully completed Grand Theft Auto: Anderius, which is only available in the Russian language.

Non-Modifications
Some third-party programs wrongly count as modifications. The basic criterion for a modification is changing the original game 'content' files, and these programs do not touch those files.

Trainers - Trainers are programs that run alongside the game and manipulate the game's data stored in memory. These programs can change many different things, ranging from the player's health, armor, weapons, skill and even location; to being able to spawn vehicles, modify the current vehicle (e.g. color, damage etc) and edit vehicles stored in garages; to modifying the time, game speed and weather.

Multiplayer - As all PC versions of the 3D Universe games lack multiplayer capabilities, gamer communities began the creation of unofficial multiplayer clients & servers. These programs allow players to play online with other players on public servers, or offer 'head-to-head' competitions between directly connected players. Types of gameplay provided may differ between different realizations, but usually are versions of FPS-like deathmatch/CTF or rally/street races. Examples are Multi Theft Auto, Vice City Multiplayer and San Andreas Multiplayer.

Enhancers - These are additional programs/libraries which remove or increase certain GTA game engine limits and restrictions, like maximum draw distance and number of objects in scene. Display of these restrictions are well known drops of road textures, delays of LOD textures on buildings when moving fast and traffic unification with current protagonist car driven. Some of these enhancers also apply modern shader post-processing effects to a game's graphics. Noted enhancers are SA Limit Adjuster and ENBSeries tweakers.

Creating Modifications
Some things, like car colors and handling, weapons characteristics, and pedestrian relations, can be changed easily because all of the necessary data is stored in plain-text files, with basic guidelines for their usage from the game's developers in file headers. However, creating more advanced modifications (such as entire buildings or cars) are trickier, and usually requires some advance experience in creating models for games. Google SketchUp is a good program for creating building models. 3DS Max, Lightwave and Zmodeller are also used. Texture creation is also not so simple; textures must match with specific game engine limitations and should be organized by special order into TXD files.

Mission modifications are even harder to produce. First, the mission script for a game must be presented in compiled form, which requires use of special compiler/decompiler tools for any changes. Second, script language is not officially documented, and worse, each script editor has their own interpretation of it. Finally, many script features depend on hardcoded functions in the game executable, which can lead to unexpected troubles with different usage approaches, game region versions, official patches, and even it depends on end-user hardware. This results in mission modifications that are usually simple gameplay missions. The most often used mission script editor is Mission Builder by Barton Waterduck and its derivative, Sanny Builder.

For Total Conversions, there are even more specific tools needed, like a ped & traffic paths editor, GXT (texts) editor, interface (menu) editor and so on. It is strongly advised that you do not attempt to do more than what you are capable of. Do not expect to be able to recreate your favourite car in a few hours. Many modifications take months.

Vice City Mod Manager
Vice City Mod Manager or VCMM, is a tool for modifying objects in Grand Theft Auto: Vice City. VCMM uses its own file format VCM, and mods can be downloaded in this format from many different websites.

San Andreas Mod Manager
There is another mod manager for GTA: San Andreas. It does the same thing as the Vice City Mod Manager.

Installing Modifications
Vehicles, player and weapons modifications are usually constructed on replacement of already present game objects, because there are limits to number of objects of such kind in game engine, often already filled up by developers, and addition of the new model will require a lot of 'precision' editing in many game files. Therefore, a new car, weapon or clothing will replace the existing one and all installation is reduced to work with IMG archives and little editing of one or two game files in text editor. Always do backup of files touched before any changes occurs.

Installation of larger modifications, such as maps, depends on a method chosen by the developer of the mod. Some mods are made as file replacements. Mods come in form of archives which you must unpack to original game`s directory. This simplified installation causes large files to download. Other mods come with special installers (mod installers), which automates work with IMG archives and text-files editing. Both methods are usually incompatible with other mods present, so you must install them over special fresh installation of the original game.

Considerations
Some gamers consider modifications to spoil the integrity and theme of the game - for example, they don't think a 2005 Lamborghini belongs in a fictitious 1990s world, although you can make your own decisions on these matters.

Most modifications do not alter the status of your game. However, if you install a modification that edits or replaces the mission script file, you will have to begin a new game (except in rare cases), or use a provided savegame created for that specific modification. The game will crash immediately if you've tried to load an old savegame file.

Some modifications (particularly Vehicle and Scenery modifications) make story missions harder to complete, or even impossible to complete. It is advised to either obtain a complete savegame or uninstall the offending mods if you intend to progress the game's story. Modifications that were badly coded (mainly missions) or contain many hi-quality textures and models may result in game performance degradation, jerky framerate and various graphical glitches, especially on old hardware.

In April 2015, shortly after modifications were being produced for the PC version of Grand Theft Auto V, it was discovered that several modification scripts contained a Malware keylogger, which was implemented by the mod's creator to steal personal information. This included bank details and PayPal logins. Although the offending creator was caught and punished, and the offending code and mods removed ('cleaned' versions would later appear, lacking the malware code) this pushed the risks of installing script mods to the limelight - Such scripts may easily contain malware or programs designed to alter or steal data.

Modding on Console
As with the previous GTA games, modding continues to be prevalent in Grand Theft Auto IV.

While modding on the PC is more popular, many players also mod the Xbox 360 and PS3 versions of GTA IV, mostly in multiplayer, even though these mods are usually not as similar as the ones on the PC version.

The most predominantly used mods on the console versions of GTA IV usually give the player some abilities, such as:
 * The ability to shoot rockets out of guns other than rocket launchers.
 * Super speed.
 * Better handling such as drift mods, even though it is not as smooth as it is without it.
 * Spawning and editing of cars sometimes not found in Multiplayer. such as changing the color to any color available for any car, Editing of body kits and other variable pieces.
 * The ability to add light props to the inside of any car in order to look like neon lights under the car but or mostly just light poles such as on helipads.
 * Picking up and throwing of self or other players.
 * Igniting self or other players.
 * Instant killing of self or others.
 * Replace model of some vehicles. For example: replacing helicopter model with airplane model to change its appearance without using other mods as these do not work on console.
 * Teleporting of self or other players.
 * Infinite ammo, and god mode, although they still may die if they are travelling outside of the map boundaries.
 * The ability to spawn in props from the game files such as qubiz blocks or skateboard ramps sometimes making entire tracks out of them or spawning in pre set tracks, or sometimes pure explosions or fire.
 * Instant auto aim with almost 100% accuracy in everything including helicopters.

Disclaimer
Modify your game at your own risk. There is no guarantee that all modifications you download will work, or whether the instructions will be complete. You should make yourself familiar with simple well-known modifications (such as cars) before attempting to install larger and more complex models.

Should you access GTA Online with modifications enabled, your Social Club account will be automatically suspended.

Always read the instructions thoroughly, and always backup files before you edit