Official support for HALionOne ended years ago as Steinberg moved toward 64-bit architecture and new licensing systems. Halion One (VST Sound Instrument Set) worth installing?
Finding a can be tricky because the original plugin is a legacy product that has been discontinued and replaced by newer versions. While you cannot download HALion One as a standalone free product directly from Steinberg today, there are official ways to access its sounds or its modern successor for free. The Status of HALion One halionone vst free download
If you are looking for the "HALion" experience for free, Steinberg has replaced the old SE and One versions with , which is a completely free player. Free VST instruments from Steinberg | Halion Sonic | Cubase Official support for HALionOne ended years ago as