Deleted 5 years ago
Viewing post in Can't install Bunny Bash
the key is real but how the developer give away the file might depent how he did it. It is only a text file but might also be a bad key since Valve stops developers from giving away many keys and developers could remove people key even after they submitted.
This is why only selling keys are not allow, your game could be taken away.
I'm afraid that's hard to say now. You really ought to contact the developer. Their Twitter account looks abandoned, or at least dormant, but they have a site and an e-mail address. And they seem to be known as the current maintainer of the Vulture GUI for Nethack. Thought it was a mistake at first, but it looks legit.