One I've mentioned before that I love is a compromise that sort of approaches things from the other direction; it's a compromise that
uses graphics to alleviate another issue.
This is Exile on the BBC Micro; it's a great game, with an incredibly detailed physics and reaction model for 1988. It's using an unconventional bespoke graphical mode to save memory.
The Acorn Electron is a counterpart to the BBC Micro; largely the same family, but a weaker system. It doesn't have the capability to support unconventional bespoke graphical modes... so it doesn't.
This is the Acorn Electron version. That's not a decorative border: That's the portion of screen memory that has been co-opted to store game data
I wonder if they originally intended to block out parts of it to make other numbers, like a calculator display, but couldn't get it working.