The Importance of Games in a Classroom Play. Much can be learned in play that
  Play. Much can be learned in play that will afterwards be of use  when the circumstances demand it. 
A tree must also transpire, and  needs to be copiously refreshed by wind, rain, and frost; otherwise  it easily falls into bad condition, and becomes barren. In the same  way the human body needs movement, excitement, and exercise, and in  daily life these must be supplied, either artificially or naturally.  (1)
 The first thing that most people think about when they say  the word game is fun. Since we were adolescent a game is what we did  to entertain ourselves, compete with our friends and enjoy free  time.  So why not put it into the sometimes dreaded location of a  school or even worse an English class' The classroom is one of the  best scenarios to have games. The game gives a chance to relax the  learning environment and allow for all students to produce the  language with their peers and not through guidance of a teacher. The  use of a game to emphasize a lesson point and or verify students  learning success' are great ways to create learning and fluency in  an English classroom to change and create our favorite leisure  activity, fun.  
Teachers, researchers and psychologists alike have analyzed  the use of games in classrooms in order to find successful  techniques to retain information. In a research paper by Yin Yong  Mei and Jang Yu-jing they discuss the use of games for children in  an English classroom. Here they discuss the use of it as a means to  addressing target language. 
Games add variation to a lesson and increase motivation by  providing a plausible incentive to use the target language. The game  context makes the foreign language immediately useful to the  children. It brings the target language to life. Through playing  games, students can learn English the way children learn their  mother tongue without being aware they are studying; thus without  stress, they can learn a lot. (2)
This holds true for more than just children, even adults need this  comfort and in some ways may require more, as age in some cases they  tend to put up more barriers than some adolescents. Games  appropriate for student profiles, give students of all ages an  immediate usage for any of the previously studied material. They  have to apply what they have learned understand it and play a game.  As a teacher your position is to merely help and direct if needed.  It also allows the teacher to create contexts in which the  situations are useful and meaningful, allows the learner to better  understand the material relax and learn from their peers (3). 
If there is one thing that a game does is puts a smile on a  students face. If it does not then there may be essential that you  find a new game. Games are highly motivating because they are  amusing and interesting. They can be used to give practice in all  language skills and be used to practice many types of communication  (4). It is difficult to imagine not being motivated when you are  amused and interested. A lack of motivation or inspiration would be  expected if one were annoyed or indifferent. However I would  unlikely suspect any lack of motivation when one was interested in  what was happening around them. Perhaps there are times when the use  of a game would not assist the learning material when the students  would rather learn in a more formal approach. However putting that  smile on their face at some point of a lesson with a game is getting  them to be excited and get up an move a bit in the class. That has  to be a pretty effective way to drill in what was covered in the  lesson. Think about personal experiences in school, which classes  stood out to you the most'
Reference:
(1) Nguyen Thi Thanh Huyen and Khuat Thi Thu Nga, 'Learning  Vocabulary Through Games' ´Asian EFL Journal', December 2003 translated and used on page  http://www.teflgames.com/why.html
(2) Andrew Wright, David Betteridge and Michael Buckby. Games for  Language Learning. Cambridge University Press, 1984.
(3) http://iteslj.org/Lessons/Ersoz-Games.html 



