Chrononauts All by myself by Carl Anderson
"While the real enjoyment of games comes from playing with others, it's oftentimes nice to just grab a box and go to town solo .... In solo Chrononauts, you play as a sort of overseer of a number of time travelers (the rules suggest you play with 8) who must get back to their own time continuum .... The solo game plays essentially the same as the "regular" style, except you only play with a subset of cards--no missions, no artifacts, no time warps, no actions. Your only goal, and only way of winning, is to alter the timeline to match what's on the individual ID cards .... I'm quite enjoying solo Chrononauts. It's got a built-in difficulty adjustment (simply play more IDs, or fewer), it doesn't take forever to play, and it's never the same game twice. I definitely recommend it! "