Welcome to System Defender 2! This game is a remaster of System Defender. -NEW!- ~New Cannons ~New Upgrades ~New Stages ~New Bots ~New Achievements HOW TO PLAY ~ Follow along with these instructions in-game to learn how to play. Even if you start taking damage, it is okay. ~ The objective of the game is to eliminate the enemy bots that want to damage your computer systems. Your mainframe (health) is integral; if it reaches 0, your systems become infected! ~Begin a mission by clicking on "MISSIONS" and then any stage. The later stages are more difficult. ~ Your health can be found in the upper left corner in a battery. Your health will always be full to start and will deplete if enemy bots reach the end of the path. ~ In order to eliminate bots, you need to place cannons. ~ Cannons can be placed on any outlet on the map, but only 1 cannon per outlet. To place a cannon, click on the color in which you want to buy, located in the top center of the screen, and click an outlet to place it. ~ Cannons cost energy, which is also shown in the top left corner of the screen, in front of your mainframe's health. ~ There are different types of cannons with different abilities. To save words, check them out in the "cannons" section of the main menu. ~ Each cannon costs a different amount of energy. ~ You can upgrade cannons with energy as well. To do so, click on the gear located next to the cannons in the shop after you have selected one that is already placed. Upgrades are generally expensive. ~ When an enemy is eliminated, it will grant you energy to place more cannons. ~ Sometimes, you may find a battery after an enemy is eliminated. These give you extra energy, but disappear if not clicked. ~ If you can successfully survive the onslaught of bots, you win!
Credit to Club Penguin for the idea of this tower defense game.