In recent weeks I've been playing "DDST," a fun adventure game for Atari ST BBSes that I had never tried before.
I *love* that it lets you save basically whenever you want. Makes it possible to avoid losing progress while exploring dungeons crowded with monsters and traps.
My wife took a quick peek while I was in a dungeon and asked if it was a QR code. Nope ... just some VT52 text art!