The game I played was Third World Farmer. The game requires people to experience the life of poor farmers, earning money and raising kids. All I do is to make the family survive from year to year. I played it for twice, and I found it uneasy, even frustrating sometimes, especially when I just realized that a kid somehow disappeared (I guess he died. Oh God...I am so sorry.). I grew up in a big city, and I have never experienced such life. This game gave me an illusion of struggling to live a little bit.
Comparing to casual games, such serious game might do a better job in improving students' ability of solving problems. Instead of simply enjoying the fun given by games, such games might actually offer students opportunities to solve real problems.
With this game, I can teach counting numbers in English, because there are plenty of numbers available in it. Besides the numbers, I can also teach other words appear in the game, such as hen, pig, and corn. In addition, I can make a competition based on this game. For example, students will be asked to play the game individually to see who survive the longest time. The winner will have to present his/her "blueprint". To see whether the objectives have been met, I can just ask students to present their solutions, in which target words will be used.