Alliance Distributors have posted details of a new Risk game titled Risk Legacy in which player decisions carry over from game to game. Most game details are available in a PDF sell sheet (PDF link) for the game.
From their website:
When you play a game of Risk, it gets personal. Always. But the game was never a casualty of your wars. Until now.
How will you shape your world? In Risk Legacy, every game you play will change every future game. Defend a territory, weaken an opponent, or upgrade a faction: a decision you make in Game 1 could come back to haunt you in Game 10. The risks you take in Risk Legacy are not like those in any other board game. You and your opponents will shape how your world evolves — its history, its cities, even its factions — and how they fight. You don’t forget past betrayals — and neither does the game.