Gumshoe system time-travelling investigation and action from Pelgrane, already funded at base level on Kickstarter and four stretch goals (one which involves pulp action and Nazis with dinosaurs) already unlocked.
(Not to be confused with the BBC history series. Although an episode guide for it could provide quite a few historical turning points to use as plot hooks. The Killer Cloud! The Iron Coffin! The Wave That Destroyed Atlantis!)