System Defender

System Defender was a game in Club Penguin Online and a security system for the Elite Penguin Force. All EPF Agents could play this game in the EPF Command Room. It was used to defend the EPF Mainframe computer from threats. System Defender was a Tower Defense game, using cannons to defend the mainframe before bots destroy it.

Aim
The aim of the game was to defend the EPF Mainframe computer. In most levels, Herbert and Klutzy were trying to attack the computer system by sending bugs. In one level, however, Rookie accidentally released the bugs into the computer system. Players had to stop the bugs from damaging the system by setting up defensive cannons on the map. The three types of cannon shot at the bugs at various speeds to destroy them.

Boss Bots
Boss bots were larger, harder to destroy and did more damage than regular bots. Sometimes, when destroyed, they dropped a gear which could be used to upgrade cannons.

Ultimate Protobot
The leader of all bots. The Ultimate Protobot was capable of scanning the layout that the penguin had placed, which resulted in creating attack patterns that would be harder for them.

Herbert
He was the source and rebuilder of the Ultimate Protobot and also controled all the small bots.

Test Bots
The Test Bots were built by Gary and disassembled shortly after being dangerous; later rebuilt by the Ultimate Protobot. JetBot controlled the red bots, WheelBot controlled the yellow bots and SnowBot controlled the purple bots.

Klutzy
Klutzy mistook Herbert's computer with an arcade, and attacked the EPF.

Enemy Bots Attack
Enemy bots are attacking the EPF mainframe computer. But who is responsible?

Herbert Attacks
HERBERT ATTACKS! Herbert is set on destroying the EPF. Can you stop him in time?

Klutzy Attacks
The EPF faces one of its toughest challenges when it's attacked by... Klutzy?

Test Bots Attack
The Test Bots are attacking all at once. Can you outsmart all three?

Ultimate Protobot Attacks
RED ALERT! The Ultimate Protobot is attacking the EPF mainframe. Battle Stations!

Track Herbert
TRACK HERBERT! Herbert P. Bear is back with more tricks up his sleeve. Are you ready to face him?

Trivia

 * Rookie was the cause of some robots, due to him accidentally opening a jar that was labeled "COMPUTER BUGS", when he mistook it for, "COMPUTER HUGS".
 * Tutorial level layout was identical to the Herbert Attacks level.

Stamps

 * See main article: System Defender Stamps