1. Open game world. 2. great graphics. 3. guns guns guns 4. can knife a homeless guy for fun 5. nuking a peacefull town is always fun in a game. 6. 1950's art style 7. jazz music, Maybe should be mandatory theme in all scifi rpgs 8. Malcom mcdowell plays a good villain 9. love being a hero. 10. Simply its a good fallout game.