I'm a big fan of the Twilight:2013 reflex rules. I'm planning on running a short (2-3 session) 'campaign' here before summer I hope, I'll be using the reflex system from 2013 with the basic flavor of background from Twilight:2000 - just pushing it ahead in time 13 years with some handwaving
For anyone that cares, the hardcover of 2013 is on Amazon right now for $6. I just bought two more for the players (to add to the two I already had
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