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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 Edit

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 Edit

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 Edit

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

Enemies Edit

2025 Edit

Wave Spawn Enemy Amount Notes
1st Appears at the begining of the mission. Retiarius 6
Tunel Exits 3
Spiders 23 each

4.1 Edit

Wave Spawn Enemy Amount Notes
1st Appears at the begining of the mission. Retiarius 6
Tunel Exits 1
Spiders 20
Tunel Exits 1
Spiders 8
Tunel Exits 1
Spiders 18

Online Limits Edit

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 813 808 456 454 1016 1010
Hard 2063 2242 1081 1171 2579 2803
Hardest 3376 4057 1738 2078 4220 5071

Weapon Level Limit

Game Easy & Normal Hard Hardest Inferno
2025 10 34 59 -
4.1 10 35 61 -

Approximate Weapon Drop Rate

Game Easy Normal Hard Hardest Inferno
2025 3-7 5-9 19-31 1-56 8-68
4.1 2-7 4-9 20-35 0-57 8-68

Strategy Edit

4.1 Edit

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.

Levels: Earth Defense Force 2025
1-10 ReconveneSpreading DisasterWinged War GoddessSetting SunWind BreakUnderground CaveEruptionRetaliationBeach FearThe Return
11-20 Air ForceDay of the DemonsTakedownPreventing LandfallLand CollapseFortress SiegeValley ShadowsArtilleryBreaking ThroughShining Stronghold
21-30 Into the DepthsA TrapGiant RobotsAnchoredSilver CityCrimsonHigh-SpeedBrute ForceCharge Phase 1Charge Phase 2
31-40 Charge Phase 3ThunderInfiltrationConvergenceInfernoStarshipDenseCrossingSearchWaterside Bugs
41-50 AnnihilationNatural CalamitySteel BeastVoid ShipBlue FightersEarth DefendersMountain Pass TrapFortress FrenzyPincerRavages of War
51-60 Air MobilizationBug InvasionTransport Ship Surprise AttackBug KingCrazy SkiesThe Fleet BelowBad PremonitionCity of HorrorMountains AblazeBreaking Through (2)
61-70 Bug TowerFortress AttackMountain LiberationSniper AttackTowering BeastTeeth of the UniverseGiant ShipSpearheadTower SiegeDen of Thieves
71-80 Death QueenMachine SquadMonster PartyLabyrinth of LightCity FlawsMonster CampFallen FlagshipHeaven's ArmyEncirclingDivine
81-85 The ThreatBattle to the DeathMassive MobilizationScorchingStar Eaters

Levels: Earth Defense Force 2025 Online
1-10 ReconveneSpreading DisasterWinged War GoddessSetting SunWind BreakUnderground CaveEruptionRetaliationBeach FearThe Return
11-20 Air ForceDay of the DemonsTakedownPreventing LandfallLand CollapseFortress SiegeValley ShadowsArtilleryBreaking ThroughShining Stronghold
21-30 Into the DepthsA TrapGiant RobotsSummit ShipAnchoredSilver CityCrimsonHigh-SpeedBloody MountainBrute Force
31-40 Charge Phase 1Charge Phase 2Dark PrisonerCharge Phase 3ThunderInfiltrationConvergenceInfernoStarshipDense
41-50 CrossingSearchWaterside BugsAnnihilationNatural CalamitySteel BeastVoid ShipBlue FightersEarth DefendersFleet Attack
51-60 Mountain Pass TrapFortress FrenzyPincerRavages of WarAir MobilizationBug InvasionTransport Ship Surprise AttackBug KingCrazy SkiesThe Fleet Below
61-70 Bad PremonitionCity of HorrorMountains AblazeBreaking Through (2)Bug TowerFortress AttackMountain LiberationSniper AttackMountain GiantsTowering Beast
71-80 Teeth of the UniverseGiant ShipSpearheadTower SiegeDen of ThievesDeath QueenMachine SquadMonster PartyLabyrinth of LightCity Flaws
81-90 Monster CampFallen FlagshipHeaven's ArmyEncirclingDivineThe ThreatTroubled ValleyBattle to the DeathMassive MobilizationLegion of Monsters
91-94 ScorchingDemon ArmySurrounded!Star Eaters

Levels: Earth Defense Force 4.1
1-10 ReconveneSpreading DisasterWinged War GoddessSetting SunWind ShearUnderground CaveEruptionRetaliationBeach FearThe Return
11-20 Air ForceDay of the DemonsTakedownPreventing LandfallLand CollapseFortress SiegeValley ShadowsArtilleryBreaking ThroughShining Stronghold
21-30 Into the DepthsA TrapGiant RobotsAnchoredSilver CityCrimsonAssaultHigh-SpeedBrute ForceCharge Phase 1
31-40 Charge Phase 2Charge Phase 3ThunderInfiltrationConvergenceInfernoStarshipHigh DensityDozing BeastCrossing
41-50 SearchWaterside BugsAnnihilationNatural CalamitySteel BeastVoid ShipBlue FightersEarth DefendersMountain Pass TrapFortress Frenzy
51-60 PincerRavages of WarCrashAir MobilizationBug InvasionTransport Ship Surprise AttackBug KingCrazy SkiesThe Fleet BelowIll Omen
61-70 City of HorrorMountains AblazeBreaking Through (2)Bug TowerFortress AttackMountain LiberationBattle of GiantsSniper AttackTowering BeastTeeth of the Universe
71-80 Giant ShipSpearheadTower SiegeDen of ThievesDeath QueenMachine SquadMonster PartyLabyrinth of LightCity FlawsMonster Camp
81-89 Fallen FlagshipHeaven's ArmyEncirclingDivineThe ThreatBattle to the DeathMassive MobilizationScorchingStar Eaters

Levels: Earth Defense Force 4.1 Online
1-10 ReconveneSpreading DisasterWinged War GoddessSetting SunWind ShearUnderground CaveEruptionRetaliationBeach FearThe Return
11-20 Air ForceDay of the DemonsTakedownPreventing LandfallLand CollapseFortress SiegeValley ShadowsArtilleryBreaking ThroughShining Stronghold
21-30 Into the DepthsA TrapGiant RobotsSummit ShipAnchoredSilver CityCrimsonAssaultHigh-SpeedBloody Mountain
31-40 Brute ForceCharge Phase 1Charge Phase 2Dark PrisonerCharge Phase 3ThunderInfiltrationConvergenceInfernoStarship
41-50 High DensityDozing BeastCrossingSearchWaterside BugsAnnihilationNatural CalamitySteel BeastVoid ShipBlue Fighters
51-60 Earth DefendersFleet AttackMountain Pass TrapFortress FrenzyPincerRavages of WarCrashAir MobilizationBug InvasionTransport Ship Surprise Attack
61-70 Bug KingCrazy SkiesThe Fleet BelowIll OmenCity of HorrorMountains AblazeBreaking Through (2)Bug TowerFortress AttackMountain Liberation
71-80 Battle of GiantsSniper AttackMountain GiantsTowering BeastTeeth of the UniverseGiant ShipSpearheadTower SiegeDen of ThievesDeath Queen
81-90 Machine SquadMonster PartyLabyrinth of LightCity FlawsMonster CampFallen FlagshipHeaven's ArmyEncirclingDivineThe Threat
91-98 Troubled ValleyBattle to the DeathMassive MobilizationLegion of MonstersScorchingDemon ArmySurrounded!Star Eaters

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