Can we use serious games outside classroom?

Trace Effects is made by U.S. department of state and it was made to teach students English all around the world. The game is designed for player aged 12-16. It required "gamers interact and solve puzzles in a virtual world filled with diverse English-speaking characters." When you are playing the game, you need to " take a dynamic journey through the United States, traveling to cultural locations like Kansas, New Orleans, the Grand Canyon, New York City...".
I played Chapter One and Two twice to get familiar with the conversations or other knowledge about the game. I found that students will really benefit from the game if they get into playing it. They can learn knowledge about American cultural and make comparison to their own culture as well. The game also provides students with communication strategies that they can use in daily life and they can imitate native American accent when they play it. Moreover, the game is divided into different chapters and each week, students can play one chapter and focus on one at a time. What's more, the vocabulary in the game is quite easy for students to master.
If this game is used for outside classroom,  the language objectives might be SWABT:

• understanding specific American culture
• apply communication skills to daily life (how to ask for help)
• distinguish word meaning in specific context

After students playing the game, I would like to assess them from different aspects. I can employ some communication skills into class, for example, I can set up a theme, ask them to discuss how to ask for help. They can either prepare a presentation or role-play. Another way to assess them is to have them to write a review about this game. I think journal writing would assess how much do students understand the game and how much they learn from the game.
From what I learn from this game, I think some serious games can employ outside classroom and what they teacher needs to do are to get to know the game and set up specific language objectives for the game. More importantly, the game has to match students level.