Defender is the pinball adaptation of the video game of the same name. The aim of the Pinball is much the same as the video game in that the player must rescue humans and kill the mutants.
The game features wave after wave of landers (15 in each wave) the player must destroy them all to advance to the next wave. The player is armed with 3 smart bombs at the start of game (operator adjustable) to help him/her out of jams. Player can also go for the Multi-Ball & multiplier bonuses.