It sounds like you're looking for information on "Hello Neighbor Mod Menu 2021" — likely a modified version of the Hello Neighbor game that includes a cheat or debug menu.
Steam Workshop: If you own the game on Steam, the Workshop is the easiest place to find and "subscribe" to mods that include custom menus. How to Install and Set Up Mods hello+neighbor+mod+menu+2021
Recommendation: If you wish to experiment with game mechanics or access locked areas, it is safer to look for "Debug Mode" tutorials or official console commands enabled through the game's settings, or to download high-quality custom maps via the Steam Workshop. It sounds like you're looking for information on
One known mod framework for Hello Neighbor on PC is Debug Menu by sinsiliux (circa 2021), which worked with MelonLoader. It allowed: hello+neighbor+mod+menu+2021
However, I can suggest some popular mod menus for Hello Neighbor that you might find useful:
: Many mod menus from 2021 were distributed through community hubs like or demonstrated on Mobile/Android