I am another player, not a Mod. I can give you the basics though.
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Blizzard will not approve any third party software. They don’t make it or control it so will not tell you that it is ok. They depend on you to read the rules and make good decisions.
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ANYTHING that provides functionality not provided by the core game, that automates any portion of a game/rotation, or that changes game files, is not allowed.
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Blizzard did not make a Mod sandbox for D4 like they did for WoW. There are no approved means to modify the game.
License Limitations. Blizzard may suspend or revoke your license to use the Platform, or parts, components and/or single features thereof, if you violate, or assist others in violating, the license limitations set forth below. You agree that you will not, in whole or in part or under any circumstances, do the following:
- Derivative Works: Copy or reproduce (except as provided in Section 1.B.), translate, reverse engineer, derive source code from, modify, disassemble, decompile, or create derivative works based on or related to the Platform.
- Cheating: Create, use, offer, promote, advertise, make available and/or distribute the following or assist therein:
- cheats; i.e. methods not expressly authorized by Blizzard (whether accomplished using hardware, software, a combination thereof, or otherwise), influencing and/or facilitating gameplay, including exploits of any in-game bugs, and thereby granting you and/or any other user an advantage over other players not using such methods;
- bots; i.e. any code and/or software, not expressly authorized by Blizzard, that allows the automated control of a Game, or any other feature of the Platform, e.g. the automated control of a character in a Game;
- hacks; i.e. accessing or modifying the software of the Platform in any manner not expressly authorized by Blizzard; and/or
- any code and/or software, not expressly authorized by Blizzard, that can be used in connection with the Platform and/or any component or feature thereof which changes and/or facilitates the gameplay or other functionality;
Overlays also have a tendency to cause game conflicts with Blizzard games such as crashes, grey screens, and non-responsive screen areas.