Overlords

(tips at the bottom) Overlords are the most powerful enemies in the game. They have an extremely wide variety of behaviors (too numerous for this article to fully list) and become more advanced as the game progresses. Overlords usually spawn after you have destroyed most of the other enemies on the level. Every ten levels you must defeat an advanced Overlord in order to progress.

The bar above their head indicates their current health. The purple vertical bar on their side is a directional shield they use to block projectiles and to ram the player with.

All Overlords have an extremely damaging stomp attack. Their legs will light up with energy to indicate the danger. Overlords quickly gain the ability to use portals to move around the level. They will also start using the portals as weapons from which dangerous projectiles can come through.

If the Overlord has trouble reaching you it will start firing grenades which explode to send shrapnel in your direction.

As the game progresses, Overlords will partially phase if they have taken a large amount of damage. When phased (they will be partially transparent), they can only be harmed by going into Blue mode. Overlords will stay phased as long as they are threatened - stop attacking them and get them away from danger so they will unphase.

Very late in the game Overlords gain a self-repair function. They will stand still and emit a green glow around them to quickly heal. Attack them and they will stop healing.

Late game Overlords, the red ones, can disable your weapons upon a successful melee attack.

Tips:

In the early game upgrade your shields as many times as you can.

Save the Bluetonium in a level to recharge your shields during an Overlord fight with the Bluetonium Recharge upgrade.

Overlords take FAR more damage in Blue mode. This is the best time to use your Super EMP to cut their health down to size.

Use the Super EMP early since it takes off a % of their current health.

If the Overlord is firing a lot of Death Balls from portals then use Blue Mode so they damage the Overlord.

Bluetonium can do a lot of damage to an Overlord by using Energy Manipulation.

Avoid the stomp attack at all costs. It does % damage and so it will always hurt.

If an Overlord is about to land near you then get ready to dodge. There is a good chance it will perform a charge attack.

A highly upgraded Bouncing Boomstick can do incredible damage to an Overlord if you fight tight spaces to fire it in.

Some levels have environments that are very dangerous to Overlords. They will phase to avoid the danger - but you can knock them out of it with Blue mode.

Sometimes it is better to move around the entire level as you fight the Overlord. If you stay in the same spot then the Overlord gains more teleport options - which makes it easier for it to surprise you with a deadly teleport/stomp combo.