Underrated feature in games: Fake desktops/PDAs.

One of my favorite gaming tropes! Part of me wishes it was more common, but then a different part remembers that the novelty would wear off.

Hypnospace Outlaw! The whole game is basically just being a mod of an alternate universe Geocities.

Then there's Kingsway; it's a Rougelite RPG where everything is controlled with a Windows 9x/Mac Classic parody.