Fallout: Pip-Booty

From the letters page: Fallout: Pip-Booty comes from Cumshot Chronicles Interactive and is built in Unity. It is a sandbox game built around sci-fi, dystopian setting and netorare, starring a male protagonist. Development is ongoing; the current version is 0.6. Available for Windows, Mac, Linux and Android, around 591 MB.

From the box: “Welcome to Vault 6969, also known as "No-Fap Vault"—a dystopian madhouse where all forms of sexual release are banned.”