I was puttering along, doing a number of things that needed doing, booted up the Macbook to use one bit of software that won't work on my Linux machine, no matter what, and Steam wanted updating.
Updated it, went on puttering, thought "Oh, maybe I'll update the Steam client on the Linux box too" and by doing so actively reminded myself that there are games that can be played on the desktop.
Suddenly it's Sunday evening and I spent the last three days playing through Half Life (yes, I know it's over 15 years old but see the bit before about Linux).
I still *suck* at any kind of fine motor skills. I save approximately every five seconds because ladders will kill me. But oh fuck, so addictive. And there's about 9 more parts I could play.