Publisher Blurb: Combat Advantage #20: Time Travel is now available as free as ever. In addition to our chrono-tastic theme, we also have the premier of two new features: The 4th Engine from Chris Dias (Amethyst, Neurospasta) provides us with a look at ladders in a 4e sci-fi campaign Devious Devices by Kurt Sparkuhl offers up a collection of nasty traps and hazards from both sides of the timeline. Plus our usual offerings of Mesh Hong's Bonus Bestiary and another adventure from Corwin Riddle (Timeless), there's also info on adding radiation to your campaign, and two previews from Emerald Press (that's us!): EONS and Break & Enter.