CNCEdit2K
CNCEdit2K is a brand new editor which started development in 2023. It is designed to ultimately be a one-stop-shop for the majority of Command and Conquer games, from Tiberian Dawn up to Tiberian Twlight. Initally it will support the recent Remastered version for Tiberian Dawn and Red Alert.
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The release of the remastered version had a major feature - it included the source code for the game! However, Tiberan Dawn didn't have any support for a Rules.ini file meaning that any changes you wanted to make had to be done in the source code and then you needed to recompile the C++ source code! CNCEdit2K makes this all a breeze and you do not need to know anything about programming. The setup program will automatically install Visual Studio for you and the editor directly edits the C++ source code and automatically builds the game's DLL file and installs it in a mod for you.