This game has been out for a few years at least, but I must share. The Jamestown Online Adventure is a free online game for students to play after learning about Jamestown. I use this every year, and every year students are challenged to get all "excellent" ratings.
Throughout the game, students are faced with various choices in this "Choose Your Own Adventure" type game.
At the end of the game, students get rated on 4 categories (Food, Health, Wealth, and Morale). It's a pretty quick game, so I encourage students to play repeatedly to try to get the best ratings possible. I usually give them 4 extra credit points for Excellent ratings, 3 for Good, 2 for Fair, etc. I've only seen students get 4 excellent ratings a couple of times.