Chrononauts

Chrononauts is Looney Labs' game of time travel. Players each take on the identity of a time traveller cut off from their home time. Lost in the past, the time travellers manipulate events on the timeline -- running from 1865 to 1999 -- to accomplish various goals: restore their future so they can return home, gather the artifacts required to fulfill their mission or repair paradoxes on the timeline until they are experienced enough to join the Time Agency. It's a light and fun game, similar in some ways to Fluxx, but with some elements of strategy.

Links:

Official Site

http://www.wunderland.com/LooneyLabs/Chrononauts/

Wikipedia

http://en.wikipedia.org/wiki/Chrononauts

Boardgamegeek.com

http://www.boardgamegeek.com/game/815