Yep, Valve also normalized microtransactions significantly through TF2.
Once again, Valve started it as something reasonable: Cosmetic options, then expanded to allow shortcutting unlocking alt weapons through $1-3 charges instead of through game progression (achievements unlocked alt weapons at first). Other companies followed suite in ever increasingly predatory ways, and Valve got worse with it too over time.
You might be surprised. Plenty of sites backing up whatever they can. Try archive.org and various abandonware sites.