XOR was a game released just over 20 years ago by Astral Software. I remember playing it on the Acorn Electron and not really getting very far! Suffice to say, I never completed it back then.
The game featured chickens, fish, bombs, teleports, masks and shields. The idea was to solve some rather fiendish puzzles to collect all the masks on each of 15 levels and then find the exit door.
I was quite pleased to discover that an XOR remake was created a few years ago by Ovine. This features the exact same15 levels as in the old 8-bit version.
Well, after a few weeks on-and-off, I have just managed to complete all 15 levels!
It is quite satisfying to have completed something that you started 20 years ago and has been nagging ever since!
There’s an interesting page about the history of XOR here.