Into the Depths is the is the twenty-first mission in Earth Defense Force 2025 and Earth Defense Force 4.1: The Shadow of New Despair.
Objective[]
2025: The giant bugs just keep coming. Things will only worsen as long as they have their nest. We need to strike them where they live. We will infiltrate the nest from the same point as last time, following the same route. When we are as deep as we can go, we will attack. We've no idea what to expect, so be careful.
4.1: The giant insects just keep coming. Things will only worsen as long as they have their nest, so we need to strike them where they live! We will infiltrate the nest from the same point as last time, following the same route. When we are as deep as we can go, we'll attack. We have no idea what to expect, so be careful!
Storyline[]
Storm Team, late to the party, meets with a squad of Rangers who are already engaged in battle with the giant insects. Just as the mission description said they make their way through the same subway station as before. However since the hole that they used to access the insect caves collapsed, they have to take the less scenic route throught the subway tunnels.
Eventually they arrive the cave system where Ranger 7 is surrounded by giant insects. The soldiers make their way to a collapsed section of the subway tunnels where another Ranger team is trapped and then they enter the previously unexplored areas of the cave system where a Fencer team is waiting.
They eventually arrive into a large cavern with full of crimson ants. Wing Divers arrive to the scene not long after entering the cave. The mission ends once the last of the giant insects are destroyed.
Enemies[]
2025:[]
| Wave | Spawn | Enemy | Amount | Notes |
| 1st | Appears at the begining of the mission. | Black Ants | 5 | |
| Spiders | 15 | |||
| 2nd | Appears when there is less than 5 enemies left. | Black ants | 25 | |
| Spiders | 35 | |||
| 3rd | Appears after the last wave. | Crimson Ants | 40 |
4.1[]
| Wave | Spawn | Enemy | Amount | Notes |
| 1st | Appears at the begining of the mission. | Black Ants | 50 | |
| Spiders | 25 | |||
| 2nd | Appears when there is less than 10 enemies left. | Black Ants | 25 | |
| Spiders | 45 | |||
| 3rd | Appears after the last wave. | Crimson Ants | 40 |
Online Limits[]
Armor Limit
There's no limit for Inferno difficulty.
| Difficulty | Ranger & Air Raider | Wing Diver | Fencer | |||
| 2025 | 4.1 | 2025 | 4.1 | 2025 | 4.1 | |
| Easy & Normal | 636 | 626 | 368 | 363 | 795 | 783 |
| Hard | 1822 | 1912 | 961 | 1006 | 2277 | 2391 |
| Hardest | 3214 | 3809 | 1657 | 1954 | 4018 | 4761 |
Weapon Level Limit
| Game | Easy & Normal | Hard | Hardest | Inferno |
| 2025 | 7 | 30 | 55 | 96 |
| 4.1 | 7 | 30 | 57 | 96 |
Approximate Weapon Drop Rate
| Game | Easy | Normal | Hard | Hardest | Inferno |
| 2025 | 0-4 | 1-5 | 14-26 | 0-51 | 0-60 |
| 4.1 | 0-4 | 0-5 | 16-31 | 0-52 | 1-61 |
Strategy[]
The most part of this mission is located in narrow corridors which act as excellent choke points. The only exception are the big chamber at the end of the subway tunnel and the large cavern at the end of the mission. However the player can retreat to the entrance of these areas that are narrower, if necessary.
| 1-10 | Reconvene • Spreading Disaster • Winged War Goddess • Setting Sun • Wind Break • Underground Cave • Eruption • Retaliation • Beach Fear • The Return |
| 11-20 | Air Force • Day of the Demons • Takedown • Preventing Landfall • Land Collapse • Fortress Siege • Valley Shadows • Artillery • Breaking Through • Shining Stronghold |
| 21-30 | Into the Depths • A Trap • Giant Robots • Summit Ship • Anchored • Silver City • Crimson • High-Speed • Bloody Mountain • Brute Force |
| 31-40 | Charge Phase 1 • Charge Phase 2 • Dark Prisoner • Charge Phase 3 • Thunder • Infiltration • Convergence • Inferno • Starship • Dense |
| 41-50 | Crossing • Search • Waterside Bugs • Annihilation • Natural Calamity • Steel Beast • Void Ship • Blue Fighters • Earth Defenders • Fleet Attack |
| 51-60 | Mountain Pass Trap • Fortress Frenzy • Pincer • Ravages of War • Air Mobilization • Bug Invasion • Transport Ship Surprise Attack • Bug King • Crazy Skies • The Fleet Below |
| 61-70 | Bad Premonition • City of Horror • Mountains Ablaze • Breaking Through (2) • Bug Tower • Fortress Attack • Mountain Liberation • Sniper Attack • Mountain Giants • Towering Beast |
| 71-80 | Teeth of the Universe • Giant Ship • Spearhead • Tower Siege • Den of Thieves • Death Queen • Machine Squad • Monster Party • Labyrinth of Light • City Flaws |
| 81-90 | Monster Camp • Fallen Flagship • Heaven's Army • Encircling • Divine • The Threat • Troubled Valley • Battle to the Death • Massive Mobilization • Legion of Monsters |
| 91-94 | Scorching • Demon Army • Surrounded! • Star Eaters |
| DLC 1: Special Forces | Exploration • Giant's Advance • Silver Camp • Citadel • Floating Fleet |
| DLC 2: Mutant Rampage | Advance • Mountain Assault • Enemy Camp Infiltration • Underground Advance • Giant Robots • Battle Species • Beast Mountain • Dark Arena • Gathering Around • Armored Species • Iron Wall • Mountain of Change • Whirlwind of Death • Bugged City • The Tough • Golden Darkness • True King • Final Impact • Into Destruction • Ship of Dragons |
| DLC 3: Beyond Despair | Tracking • Underground Complex • Blocked Pass • Close Formation • Dragon Ship Fleet • Heavy Artillery • Bloody River • Dangerous Goldmines • Beast Mobilization • Total Protection • Aerial Bombing • King of Armor • Cannon Defenders • Traps Behind • Four Kings of Nightmares • Resistance Against the Twilight • Shivering Nexus • Three Giants • Crimson Lotus • Starry Prison |
| 1-10 | Reconvene • Spreading Disaster • Winged War Goddess • Setting Sun • Wind Shear • Underground Cave • Eruption • Retaliation • Beach Fear • The Return |
| 11-20 | Air Force • Day of the Demons • Takedown • Preventing Landfall • Land Collapse • Fortress Siege • Valley Shadows • Artillery • Breaking Through • Shining Stronghold |
| 21-30 | Into the Depths • A Trap • Giant Robots • Summit Ship • Anchored • Silver City • Crimson • Assault • High-Speed • Bloody Mountain |
| 31-40 | Brute Force • Charge Phase 1 • Charge Phase 2 • Dark Prisoner • Charge Phase 3 • Thunder • Infiltration • Convergence • Inferno • Starship |
| 41-50 | High Density • Dozing Beast • Crossing • Search • Waterside Bugs • Annihilation • Natural Calamity • Steel Beast • Void Ship • Blue Fighters |
| 51-60 | Earth Defenders • Fleet Attack • Mountain Pass Trap • Fortress Frenzy • Pincer • Ravages of War • Crash • Air Mobilization • Bug Invasion • Transport Ship Surprise Attack |
| 61-70 | Bug King • Crazy Skies • The Fleet Below • Ill Omen • City of Horror • Mountains Ablaze • Breaking Through (2) • Bug Tower • Fortress Attack • Mountain Liberation |
| 71-80 | Battle of Giants • Sniper Attack • Mountain Giants • Towering Beast • Teeth of the Universe • Giant Ship • Spearhead • Tower Siege • Den of Thieves • Death Queen |
| 81-90 | Machine Squad • Monster Party • Labyrinth of Light • City Flaws • Monster Camp • Fallen Flagship • Heaven's Army • Encircling • Divine • The Threat |
| 91-98 | Troubled Valley • Battle to the Death • Massive Mobilization • Legion of Monsters • Scorching • Demon Army • Surrounded! • Star Eaters |
| DLC 1: Time of the Mutants | Air Offensive • Giants Advance • Recon • Dust Town • Defense Line • Underground Advance • War Breed • Mountain Assault • Enemy Camp Infiltration • Dark Arena • Beast Mountain • God's Army • The Gathering • Armored Species • Iron Wall • Silver Base • Shifting Mountain • Whirlwind of Death • Bugged City • Toughness • Golden Darkness • True Sovereign • Final Impact • Floating Fleet • Into Destruction • Ship of Dragons |
| DLC 2: Extreme Battle | Tracking Bogeys • Underground Complex • Blocked Pass • Close Formation • Dragon Ship Fleet • Heavy Artillery • Overflight • Dangerous Goldmines • Beast Mobilization • Total Protection • Bombs Away • King of Armor • Cannon Defenders • Bloody River • Three Giants • Traps from Behind • The Four Horsemen • Cross the Line • Facing Off • Crimson Lotus • Shivering Nexus • Last Bastion • Starry Prison |