What style of games are they You have a few options but it would not be easy. I would sugest making a demo version as share ware and give it out free then offer them a way to purchase the full version.this is the best way to get it out infront of people.
Make a beta version for the user/ potential buyer to test play, they will buy the game if the beta version is attracting them.
those peoples are like s games most you can offer them and what kind of your game it also very important.