What we know
A page titled "Moon — Zombies": a single-player wave shooter in the style of Call of Duty Zombies. Its objective panel reads "Restore power, gather equipment from the Mystery Box, and follow the station's clues", and the HUD shows a score, an M1911 and an ammo count. The page shows no creator, credits or links, and does not say whether it is a port or a fan-made recreation.
Links
Deep dive in progress
This page is a short entry. The full write-up (original game, who built the port, how to play, creators and sources) comes next.
We have not confirmed whether it needs your own game files. Unofficial fan project: it can be removed without notice. Not legal advice. Never run a launcher or download from a page you do not trust.