"Ant Buster" is an online game created by R. Stein. It is a member of the "tower defense" genre. Players defend a picnic from an ant attack by using cannons.
The game can be played at a number of different websites in a browser that is capable of running Flash. Players use a mouse or trackpad to place cannons in defense of their picnic food. Waves of ants then attack the picnic, and successful defense requires careful placement of cannons. Cannons can also evolve to more powerful forms, such as missile launchers and ice cannons, as the player earns points.