Mint was a reaction to Gnome 3, the unique workflow upset a lot of people and the people behind Mint decided to build Cinnamon desktop (its Gnome 3 made to look/work like Gnome 2). They needed a distribution to build/test their work and so based a distribution off of Ubuntu and called it Mint.
As a bit of explanation, there are only a few projects which attempt to build an entire linux distribution from scratch. This involves finding code from thousands of sources, work out packaging, etc.. We call these 'base' distributions, Debian is the base distribution for Ubuntu, Ubuntu is the base distribution for Mint.
Ubuntu tends to be slightly ahead of Debian in the software versions it uses and automatically enables the 'non-free' repositories. Ubuntu tends to push some Canonical specific things like Snaps (which everyone hates)
I believe Mint rolls the Canonical specific things out of Ubuntu and you get the latest version of Cinnamon.
Its all a bit...
As someone who bought Half Life 2 when it was released ..
I only remember people being excited about Steam, Web stores weren't a thing back then and they were the future! (It was the following years of audio and ebook stores locking stuff down and evapourating that taught us to hate it).
Game/Audio CD DRM hacking the kernel and breaking/massively slowing down your PC was pretty common back then and Steam' s DRM didn't do that.
The HL2 disc installer didn't require you to install Steam, once installed it asked you to setup Steam and there was a sticker under the DVD with the Steam code for you to enter.
You were then rewarded with a copy of HL2 Deathmatch and Counterstrike Source.
Steam wasn't always on DRM, back then ADSL/DSL was relatively new and alot of people were still stuck on Dial Up modems.
Steam let you sign in and authorize your games for 30 days at which point you would need to log into Steam again. This was incredibly helpful feature for young me.