DECRYPTO Project's another one of those desktop job games where you work for the government. You decrypt user messages that have been sent in different ciphers so that the government can root out criminals and soon train a computer to do it all automatically. I highly recommend playing all the way to the end. I thought it was just alright at first, but I became very interested when that next layer to the game showed up.
https://store.steampowered.com/app/3565680/DECRYPTO_Project/