Rampart is an arcade game, released in 1990 by Atari Games, that combines the shoot 'em up and puzzle genres. It is widely-ported, with versions for most contemporary systems. The single-player game consists of six levels. The ultimate aim is to destroy a fleet of attacking ships while repairing any damage the fort sustains. At the start of each level, the player chooses the location of their fort from a number of options. This location is then surrounded by a wall to form a castle, which the player can then place cannons within. After this, an attacking round commences, followed by a repair round, where any damage to the castle must be repaired. If the player manages to survive the repair phase (by surrounding at least one castle within a time limit), he is given a short amount of time to place additional cannons within the walls of his fort (if he made room for them), after which the battle resumes. This cycle continues until either the player fails a repair round, or enough ships in the enemy's fleet are sunk. When the opposing navy has been sufficiently depleted, the level is won, and the player may then choose another level from the island map.