Risk Legacy puts "regular" Risk to shame for two very important reasons:
1) You do not win by the "total Global domination" that was used in previous games. Instead, you must gain 4 victory points, so you'll find yourself trying to strategize quick strikes to gain control of key regions.
2) With each game that you play, you alter the world in the game FOREVER! You use a permanent marker to name regions and place stickers on the board to show ammo shortages and new cities. After several games, you will have a completely unique game that no one else in the world will have an exact copy of.
This is such a unique idea for a game; I truly hope that designers use this idea more in the future!