Hollow Knight (patch 1.5.x.x onwards) is a game built with Unity 2020.2.2 and C# (.NET Framework 4.7.2), this means that a mod in the context of hollow knight is a dll or a Dynamic-Link Library that allows players to modify the behavior of the game, fix issues or add new features. Please note that this documentation is being written with the latest patch of the game in mind, for older patches you can refer to the documentation at radiance.host Introduction: