As for the current one, a few years ago (2016), I wrote a new game for the PDP-1, a Computer Space simulator for the machine that inspired this first coin-op arcade video game. (Hence, Ironic Computer Space Simulator or short ICSS.) It proves that the venerable PDP-1 is capable of running a video game at 60 fps!

https://www.masswerk.at/icss/

As this was a RetroChallenge project, there's also project blog: https://www.masswerk.at/rc2016/10/