Gates

Gates are large and durable objects which protect and create a portal in the middle of them. They usually use these portals to summon trap drones and mini-bots into the level. Every 5 levels you must destroy the Gate in order to advance.

Gates are protected by an invincible shield which makes a distinct sound when hit. This shield is only lowered by destroying all the spawners on the level which power the shield.

When destroyed Gates release high-density debris which can crush and kill a player easily. After the Gate is destroyed an Overlord will soon appear on the level.

By themselves, Gates are not extremely dangerous, but they slowly fill the level with traps and trap drones which can pose significant threats.

Standing on a Gate will freeze it in position, but the player will be moved with the rotation of the Gate.

Occasionally Gates will be phased, and in addition to lowering their shields, you must also activate Blue mode to destroy them - which likely means you won't have Blue mode for when the Overlord appears.