The source code of the Command & Conquer Remastered Collection will be published together with the new editions. The head of development responsible for the project at Electronic Arts Jim Vessella (interview on Golem.de) gave a longer one Post on Reddit known.
Specifically, it is about TiberianDawn.dll and RedAlert.dll and the associated source code. The files are to be published under the GPL Version 3.0 license. With the material, modders can develop their own maps, units, assets and gameplay logics for the new versions of Command & Conquer and Red Alert and integrate them into the game.
When, how and where exactly the source code will be published is not yet known. In one FAQ answers EA currently just a few of the basic questions about mods. Among other things, it reads how the mods are used on Origin and Steam and that they only work in battles and separate missions for single players.
Command & Conquer Remastered Collection will be released on June 5, 2020 via Steam and Origin. The collection includes the first Command & Conquer, which appeared in 1995 with the subtitle Tiberian Dawn, and C&C Red Alert, which was launched in 1996. The extensions of the state of emergency, counterattack and retaliation are also included.
The real-time strategy games appear with revised graphics, including support for 4K resolutions. The soundtrack with over seven hours of playing time is remixed by the original composer Frank Klepacki.
Content innovations are a revised user interface and a map editor. The multiplayer mode offers, among other things, custom games, 1-on-1 battles, Elo-based matchmaking, leaderboards and replays.
By the way, there will not be multiplayer via Lan, as Vessella writes on Reddit. Support was planned, but had to be canceled due to the difficult working conditions due to the corona crisis. The function may be submitted later.