So today I finally went and did it. I completed the "Little Rocket Man" achievement in Half-Life 2: Episode 2. For those of you not aware, this achievement basically entails taking a small garden gnome from a shack in the beginning of the game, and carrying it with you through the whole game until just before the end, where you load it into a rocket which is about to get blasted off into space.
It is, perhaps, the pinnacle of gaming insanity. And I did it.