Getting a gamer a gift can be very confusing especially if you don't have as much of a clue on what type of game to get him. Tastes and preferences on games vary and you can practically find many games for every style and type. You cannot just ask your gamer what games he likes which he still doesn't have for it will ruin the surprise and give him a clue as to the likely Christmas gift that you will be giving him.
The first step that you could undertake is to get an idea of what game your gamer would likely appreciate. To get some clues, head over to your gamer's home and do some research and do undercover work to get some first hand information. Find the chance to take a look at his game collection and if possible list the game titles that he already has. This will not only clue you in on the type of games that he likes to play with but will also help eliminate the possibility of you buying a game that he already has.
Having obtained the list, it is time to visit gaming shops to get a list of the latest game releases or taking a look at the existing collection they have to offer. Find game titles of similar groups of styles or types. Analyze from your list your gamer's preference of game genres. You can also ask from the sales personnel at the gaming shop recommended games or those which are very much sellable and from there you can narrow down your choices to those which fit or suit your gamer's fondness.
Pay close attention to the ESRB rating and game ranking ratings of the game or games that you have narrowed down or chosen. The ESRB rating is equivalent to the rating given to movies like PG and R. If your gamer is a young kid, avoid buying games that are for adults only and those that require some maturity. Also, to read about reviews and ratings of various games you can always go online. Select games with high game ranking ratings.
Now, that you have chosen the game or games that will serve as your present at least you can safely say that you are on safe ground. If ever the content of the game is not that much of a concern to your recipient as long as it can give a good game, select those games with high game ranking ratings and pay close attention though to the ESRB ratings if the recipient of the gift would be a minor.