Virt-A-Mate + vamX (VaMX) is no longer available on Steam. Purchase VaMX from vamx.itch.io/vamx Or subscribe on Patreon for VIP (early access) monthly updates and bonus content. For update notifications you can join the vamX Steam Users Discord at: https://discord.gg/gjyq8mdTVr Can I still play...
sxvr.com
TLDR: Steam has now officially removed the game without giving a specific reason. If you bought it you may still receive free vamX updates (See the link for more info).
Some users say the developer may be able to appeal to the removal.