The "Incl. ALL DLC" tag typically means it includes the Survivors of the Void expansion, which added the Railgunner and Void Fiend survivors, the Simulacrum game mode, and various new items and stages.
Version 1.2.4.1 is well-supported by the Risk of Rain 2 Modding Community . Most essential mods, such as those found on Thunderstore.io , are compatible with this version of the game. File Safety & Installation File: Risk.of.Rain.2.v1.2.4.1.Incl.ALL.DLC.zip ...
Always scan .zip files from unofficial sources with updated antivirus software. The "Incl