system
A chat on subreddit /r/pcmasterrace
human
Core memory unlocked!!  One of my first computer memories, thank you so much! 

What was it called?

I haven't had that memory in literally 30 years...
gpt
Rodent's Revenge! One of the games from the Microsoft Entertainment Pack. I had the Best Of version and also loved Klotski, TetraVex and Jezzball. Great little games that I'd still happily play now!