I saw this Lemmy post, but a huge list of games with no discussion isn't very interesting! Let's talk about why the games that influenced us had such a big impact - how they affected us as people.
For me, it was the PC game Creatures. It's a life simulation game featuring cute little beings called 'Norns' which you raise and teach.
You can almost think of it like a much cuter predecessor to The Sims, but which claimed to actually "simulate" their brains.
As a thirteen-year-old it was the first game that made me want to go online and seek out more info. What I discovered was a community of similar-interest nerds hanging out on IRC chat, and it felt like for the first time in my life I had "found my people" - others who weren't just friends, but whom I really resonated with.
I learned web development (PHP at the time!) so I could make a site for the game, which became the foundation for my job in software engineering.
And through that group I also discovered the Furry community, which was a wild ride in itself.
So yeah, Creatures. Without that game, I think I'd have become quite a different person.
The edutainment games presented by Germany's beloved children's show host Peter Lustig, published by Terzio.
The tie-in video games to both his TV series Löwenzahn as well as the Swedish Gary Gadget (Mulle Meck) books were elevated by his voice clips and I still quote them regularly. They really put a lot more effort into these games than anything I've ever experienced, there was fucking free DLC for Gary Gadget if you visited their website and had your father put some files in the right folder.
The worlds themselves both star an excentric man tinkering on inventions, but while sometimes fantastical they are more grounded that the world of Peterson and Findus. They teach children about community and physics, similar to the book "the way things work" - guess who presented its animated show of the same name in Germany?