There is not much to specify for the question, its really simple: Which title is the first game you have purchased on Steam? Was it a good decision? How much did you pay? When was it and what device? You don’t have to answer all questions, this is just a fun discussion to have.
You can check your history: https://store.steampowered.com/account/history/ Edit: Some in the comments pointed out that the purchase history doesn’t go back all to the beginnings of Steam. So if you purchased something earlier, it won’t be listed on your account.
(I reply with my game too.)
Oof, being on dial-up when skyrim released would be rough. I was on dial up until 2010 or so, and pretty much had to go other places to download anything onto a USB and then transport it back home.
I was stuck on dial up until 2015 when I moved. High speed internet opened so many possibilities. Just in time for ARK early access.