Generally dreams about playing a game have the opposite meaning in real life. For example if you dream that you are playing a losing game it means that the upcoming period of time will be quite pleasant for you.
Simply dreaming that you are a part of a game without being aware whether you are losing or wining indicates that in the upcoming times you will quite active socially. A lot of new faces will be met and there will likely be a possibility for a new romantic relationship.
If in you dream you simply see a game without taking part in it means that your position in your professional life might get threatened by rivalry in the upcoming time. In general, this dream also signifies that competition will get stronger in your professional life quite soon.
If you dream that you play a game and you are very successful at it by being easily able to win it indicates that you might have to face the consequences of you spending habits in the future. Moderation of your spending is advised. This is especially true if you have this dream in the early morning hours.
A dream in which you are playing a losing game signifies that a lot of pleasant things await you in real life. This is true for both the personal and the professional side of your life. Occasionally this dream can signify that you are preoccupied with you desires to be successful.
Occasionally dreams that feature games signify that you will have a multitude of opportunities in your professional life in the next few months. These opportunities will not be completely unexpected but rather you can consider them to be a reward for your hard work.
Seeing a friend of yours playing a game signifies that they might get fooled by a third party soon. They might not get what they deserve in a sense.