Product of Your Imagination

I was reminded, when digging out the D&D Expert rulebook, that TSR had possibly the best slogan of any RPG company.

Products of YOUR Imagination. It follows on from something Gygax (presumably) wrote in OD&D: "why have us do any more of your imagining for you?" Well, as Gygax would learn, for one thing if the people who buy your rules have sufficient imaginative powers (and energy, and time), you only need to sell them one book. Ever. 

(There was a few threads on various fora about 'dead' RPGs - but a game is not dead that which can eternal be played.)