1984, Jet Set Willy was released. A great game that every kid at school wanted. Of course we all wanted a copy, but it cost £8 here in the UK, which was several weeks' pocket money.
Copying games then involved finding a kid whose Dad was seriously into Hifi and had a stackable stereo system, then we'd copy it with their tape to tape system. But JSW had this as the cassette inlay.
How this works? When the game loaded after about 10-15 minutes, it would ask what colours were in Grid square A5, or H9 etc. Get it wrong twice and the game would exit and you'd need to start over.
(If you're wondering what happens if you're colour blind - you could write to the publishers and if they accepted your complaint, they would ask you to send them the game and would give you a cheque to cover the refund)
Of course, kids are determined and inventive, and this was well before photocopiers or digital cameras, so we would spend our lunchtimes with pencil and paper writing down every single combination...
It was a good game, with some great music, but really really hard.
(Credit to https://intarch.ac.uk/journal/issue45/2/1.html for the picture, and the page also goes into more depth)
It always blows my mind just how much resources companies are willing to spend on DRM. Like, surely at some point your R&D costs will outweigh whatever piracy you might have prevented, and that prevention rate will never, ever be 100%. And that's assuming they spent extra resources on DRM and didn't take it out of the actual game development budget, resulting in a shittier product and less sales as a result.
It reminds me of when the transit system in my city introduced fare gates. It massively inflated the operating cost and guess what? It only ever stopped honest people who either forgot to load their card or were new to the transit system/city and didn't understand the zone system, so loaded a 1 zone pass and had the audacity to ride even one station outside the city they got on (not to mention when the system glitched and refused to let you out even when you did pay). The people habitually not paying just casually push past the fare gates and no one stops them. I'd genuinely be suprised if they're even breaking even with the operating/maintenance costs vs whatever few unintentional fare dodgers they manage to stop. Most likely they're losing money, while making the transit system less efficient by introducing a bottleneck, while discouraging drivers from trying out transit, just because they can't stand the idea that people can just walk on the train without paying (even though they haven't actually stopped them).