This reminds me of Braintree and their hidden games in the source code. They used to have it some time ago: there were some links and instructions in the source

This reminds me of Braintree and their hidden games in the source code. They used to have it some time ago: there were some links and instructions in the source code that you could use to access some URLs with classic videogames, Braintree themed. This "little" details make developers take the company more seriously, somehow: "If they make the effort to develop this just to make developers smile, they must be extra committed to their code and their API quality". Not sure if true, but it's an effective strategy. Kudos to them.