Infiltration

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

Objective
2025: The Retiarius have invaded the buildings. The wing Divers launched an attack, but were forced to retreat. There are underground tunnels in the area and spider-like aliens have emerged from them. Nearby squads are hurrying to help. Support the Wing Divers.

4.1: THe Retiarii have invaded the business district! The Wing Divers launched a counter-offensive, but were forced to retreat as spider-like aliens emerged from underground tunnels in the area. Nearby squads are hurrying to help, but they may not be enough. Support the Wing Divers!

Storyline
Storm Team and a Ranger team arrives to the scene, when HQ tells them to rescue the people trapped in the webs. The soldiers can see a small park ahead with Retiarius webs, with Wing Divers trapped in them, between the surrounding buildings and three Tunnel Exits on top of it. The teams clear the area and the mission ends.

4.1 Changes
Storm Team now spawns from the other end of the park near the overpass. More enemies and more allies appear on the mission.

4.1
Bring weapons with high damage to destroy the Retiarii and the Tunnel Exits and weapons that can deal with a swarm of spiders.

It's best if you don't run into the middle unless you want to be shot by Retiarii from every direction. Kill the Retiarius closest to you then concentrate on the spiders and tunnels. When you are moving towards the farthest tunnel it's best if you kill the Retiatius on your side so you won't be shot from the back.