Hands down, slot games are the most popular games online. What makes a slot game the most popular? It depends on what an online player looks for in a slot game. There could be a hundred reasons why a slot game is so enticing. It could be its theme, bonus features, jackpot, free spins, and/or interactivity within the game itself. Every online player has a favorite slot game. To the degree to which it becomes popular is a purely subjective one. Thus, in our attempt to provide you with the most popular games online today, we look to the online player, the online casino, and other sources that tell us what games are the most popular. Therefore, we invite you to peruse the list below to see if you agree that the following slot games have become the most popular.