The Government/UN

The Government in Earth Taken supposedly responded shortly after the alien species landed on Planet Earth. The Government fought but lost to the alien's superior technology, and instead of giving up they set up many small shelters, one being Safehouse 17 which is the first safehouse found in Earth Taken 1. In Safehouse 17's HQ room you find Commander Landon. He tells you to go to a close shelter to ask them to evacuate and go to Safehouse 17. Apart from Safehouse 17, soldiers are not seen anywhere in Earth Taken 1.

When you arrive at the other shelter, Jonah, the leader of this small place tells you the Government are evil and are "Handing us over like damned lambs for the slaughter". Later, in Earth Taken 2, the Government's soldiers become enemies, and will not be attacked by Alien Infantry, Alien Heavies, Alien Bombers, Alien Heavy Pistoliers, Mecha Aliens, Alien Saucers, and finally Leapers. Also, in Earth Taken 2, you meet Commander Landon where he tells you that the aliens have dressed brainwashed people in military suits. Since you begin Earth Taken 3 being prepared to be brainwashed, it is believed that Commander Landon is speaking the truth, but it isn't confirmed.

It currently isn't known which person is telling the truth, it is suggested by the small community of Earth Taken that it will come up some point in Earth Taken 4, if it ever does release.

It is also known that the Laser Cannon, a charge up weapon and the most powerful in Earth Taken 2 and 3 (not counting Earth Taken 3's mech laser cannon) was being created before the invasion, and was completed and distributed around 2 days or a few more after the alien threat landed on the Earth.

The alien's 'backpacks' shoot out a blue flame, likely tech related, and the soldier's backpacks shoot out fire, and unlike the player's backpack and other non-hostile NPCs, it does not have a small, white oxygen tank on the side of it.

At the end of Earth Taken 1, the Government drops nuclear bombs on major areas added the radiation feature to Earth Taken 2 and Earth Taken 3.