Some popular two-player online games include "Superfighters" and "Football Heads: 2014 World Cup Game" from Y8.com. As of 2015, "Superfighters" has a rating of 94 percent among website users, while "Football Heads: 2014 World Cup Game" has a rating of 91 percent.
In "Superfighters," players work together to fight enemies that appear on the screen. To succeed, players must avoid attacks from enemies while searching for weapons on the ground to fend off their attacks. In "Football Heads: 2014 World Cup Game," players take turns trying to score goals against each other using characters with exaggerated head sizes. Players can either volley the ball back and forth with the heads or press the space bar to kick.