Modern digital rights management (DRM), such as Denuvo or online server checks, has abstracted this process into the background. However, the Knights of Xentar code wheel remains a superior example of DRM that, while intrusive, offered a tactile component to the gaming experience that is absent in the modern, digital-only era.
The Knights of Xentar code wheel wasn't just a piece of paper; it was a construction project. It usually arrived as a sheet of thick cardstock that you had to punch out and assemble with a paper fastener.
: Often featured "windows" (cut-out holes) that revealed numbers or secondary symbols as you rotated it. Inner Disc : Provided the final key or verification code.
The code wheel was a physical artifact included in the retail box. It typically consisted of several concentric cardboard or paper disks fastened in the center.
This is a reference to the in the 1995 Western PC release of Knights of Xentar (a heavily edited version of Dragon Knight III by Elf).