Does Steam require a game to be digitally signed?

Question

OpenSSL

Let's say I wrote a game on a self-written C++ engine and I want to publish it. Does Steam require a code certificate for it, at least was it in the Greenlight days?
Since the student nature is looking for alternatives to expensive services, I found information about creating an X.509 self-signed certificate using OpenSSL. Would such a certificate work?

Answer 1

Put a couple of indies and check if the binary and libraries are signed.

Answer 2

I can’t say anything about “requires or does not require”, but games on naked SFML (and there it is obviously self-written dviglo) are laid out without problems.