Time And Time Again
Back in my college days, I ran a lengthy GURPS Supers campaign for many years. The joys of the GURPS library – even then – was having a plethora of sourcebooks on hand. So every session, I kept handy the usual supplements needed for the game (Supers, GURPS Psionics, GURPS High-Tech, etc.). For months, I also brought GURPS Time Travel. The first few times, the players groaned in anticipation: "Looks like we're hopping into the time stream!" But nothing ever happened, and they eventually more or less forgot about it, even as I made a point of pulling the book out and carefully setting it on the gaming table before each session.
Then, one day, I didn't bring Time Travel.
That – of course – is when the time-travel miniseries began in the campaign.
-- Steven Marsh