These games are not demos
It has message boards to help answer questions or talk about the games on there.
They also have a contest of the month to win something.
Some of the categories of the games are:
Action, Adventure, Arcade, Board, Card, Casino, Dice
Educational, Logic?/Puzzle, Simulation, Sports
They have a section for previews, cheats and hints, review and more.
Please check out the site for games and more information.
Due to the number of games I did not list them.