Defending Camelot is a tower defense video game, similar to Plants vs. Zombies, developed for PCs and consoles. The game involves Arthur who use a variety of different warriors to prevent an army of monsters from entering Camelot.

In Defending Camelot, players place different types of heroes and warriors (units), each with their own unique offensive or defensive capabilities, in a battlefield, in order to stop a horde of monsters from reaching Camelot. The playing field is divided into 5 horizontal lanes, and with rare exceptions, a monster will only move towards the player's house along one lane. Planting costs gold, which can be gathered by farmers. Most units can only attack or defend against monsters in the lane they are put in. In later levels, players can purchase stronger units with different offensive and defensive abilities.