Annihilation

 is the fourty-first offline mission and the fourty-fourth online mission in Earth Defense Force 2025 and the fourty-third offline mission and the fourty-sixth online mission in Earth Defense Force 4.1: The Shadow of New Despair.

The mission name does not really cover the intent of the Japanese phrase: it is supposed to be implying that the enemy forces are the ones being annihilated, as with the counterpart mission "Mop Up Duty" in Global Defence Force.

Objective
Both Vesions: Attack the enemy transports seen in the mountain area.

Storyline
Storm Team arrives to a routine mission with two Transport Ships dropping ants. While they are fighting enemies, another cryptic transmission, similar to the ones from the previous mission, comes in about, once again, being swallowed, but this time from Scout-10 of the local EDF branch. HQ asks to specify what is swallowing what, to which the scout infuriatingly says that the Ravagers are swallowing the Earth whole, as if this is helpful information. HQ tells off Scout-10 for claiming such a thing and asks them again, but can't get much more. The Tactics Officer then, because apparently no one else thought to when Sydney and Hawaii was attacked, checks the EDF's satellite images, discovering something that is too big to be a ship flying above Scout-10's location.

More reports can be heard as large hexagonal objects descend above Storm Team's position and start connecting to each other, slowly darkening the sky. After the Transport Ships are destroyed some of the hexagons start to drop a new type of flying drones, while more panicked soldiers can be heard.

When the vehicles are destroyed some of the hexagons start shooting and new types of Transport Ships appear out of nowhere and drop more giant insects. HQ orders to ignore the flying enemies and concentrate on the others.

Aurora Situation Report then reports the situation and doing much better job than the trained soldiers, who tried before. When the giant insects are killed the mission ends.

4.1 Changes
The mission is mostly the same. The only difference is the added Ranger and Wing Diver teams added and that the second transport ship now drops Crimson Ants instead of Black Ants.

2025
No allies on this mission.

4.1

 * A team of 3 Rangers equipped with Assault Rifles appears near the players at the begining of the mission.
 * A team of 3 Wing Divers equipped with Lances appears near the players at the begining of the mission.

Strategy
Bring a weapon that can deal with a swarm of insects from both land an air. And a weapon to destroy the Transport Ships. Most Air Raider support still works when the flying hexagons blocked out the sky. The only excepction are the satellite weapons.

Go in and deal with the ships then wait for the second wave. The flying hexagons, or the Earth Eaters as they will be called later, are mostly invincible. The red hangars and the big cone shaped cannons are the only exceptions, but similarly to the Transport Ships they can only be damaged when they are open.

It's not necessary to destroy them as the cannons will shoot straight down and can be easily avoided, while the hangars only drop enemies once during this mission. However if the player is quick enough and has a good weapon one of the hangars can be destroyed before it has a chance to drop their load.

Focus on the new flight vehicles that appear from the hangars. These are a bit more dangerous than the usual drones as they have a more accurate attack and don't bump into everything like the drones.

The Large Transport Ships on this mission are invincible, so concentrate on the bugs they drop. They fly pretty low so Wing Divers can get on top of them where only the Hornets can reach them. The same is true to the original Transport Ships from the beginning of the mission, however those have to be shot down which can be problematic from the top.

Both versions

 * This mission has the shortest description of the base games with only 10 words.