As these games were designed for older operating systems, the keygen itself might not work on modern Windows 10 or 11 machines.

The DRM functioned using a unique handshaking mechanism between the local PC software and Reflexive’s activation servers:

The phrase "reflexive arcade games keygen verified" became one of the most highly searched terms on early software-sharing forums. A keygen, short for "key generator," is a tool engineered by software crackers to replicate a registration algorithm. How the Keygens Worked