It can be so much fun when you find a really good game that you want to play all of the time. Many of us have done it in our lives, when we have managed to get hours of entertainment form a particular game. The problem is that this fun will not last forever as you will eventually complete the game.
When you have this sort of disappointment, you immediately want to find another game to replace it with that is just as much fun, if not more. This is not as easy as it might seem.
If you know people that also play the game, then try to find out what other games they play and try those out as there is a chance that you might enjoy them too. Look at games within the same genre of the game that you were playing to give you more chance of finding one that you like. It can also be worth reading some reviews of games and seeing whether there are any which sound similar to what you have played, as you are most likely to enjoy similar games.
It can be useful to think about what it was that you liked in the game and then you will be able to work out whether there are likely to be these features in an alternative game. Also consider playing a selection of games so that you can decide which might be the best for you. You may spend a lot of time doing this and it could be a lot of fun. You may even find that you like games that you never thought you would. It can take up a lot of time and if you do not fancy doing this, then reading games reviews might be a better use of your time.