Empires & Allies – What do the icons below Robotics bay represent?

Clicking on the above icon Enables or Disables the Defense Mode for Colossus. Enabling Colossus for Defense mode will engage the Omega Unit to fight for you when your base in being attacked. By default, Colossus is set to Defense mode. Also, An Omega Unit is vulnerable to take damage during a battle in Active Defense mode.

Robotics Bay Before Colossus Unlocked                (Defense Mode Disabled)	Robotics Bay with Colossus Unlocked               (Defense Mode Enabled)

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Empires & Allies Game GUIDE