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Eruption is the seventh mission in Earth Defense Force 2025 and Earth Defense Force 4.1: The Shadow of New Despair. It introduces Whale, the Transportation Team Porters and the Artillery Team, and is the first time the Operator speaks.

Objective Edit

2025: Emergency support request. Giant spiders have emerged from underground. They've invaded the city and are attacking citizens. These are a formidable enemy and there are a great many of them. The Air Raiders are taking point. Air Raiders, move out!

4.1: Emergency support request: Giant spiders have emerged from underground. They've invaded the city and are attacking civilians. These are a formidable enemy and there are a great many of them, so the Air Raiders are taking point. Air Raiders, move out!

Storyline Edit

Most of the mission is spent introducing things that the Air Raider can do. HQ kicks things off by ordering Storm Team to engage the giant insects, while Ohara cautions them that the new giant insect is "tough" (which it is not) and to fight carefully.

Interrupting them, the Tactics Officer states that the heavy air support aircraft Whale has arrived and is circling the combat area. Whale's rather jolly pilot then calls in, saying he is ready to take support requests and that the ground forces have a "friend in the air," then describing his aircraft's armament; Vulcan guns, rockets, and a 120mm cannon.

The Tactics Officer then announces that a formation of Hydra transport helicopters have arrived, identifying it as the transportation unit Porters and surprising HQ, who apparently was not expecting this to happen. Porters introduces herself and says she is ready to drop state of the art vehicles at the Air Raider's request. HQ then radios Storm Team to repeat the same information and act like it was his idea.

Finally, the Tactics Officer announces the arrival of the Artillery Team, and they introduce themselves, saying their self-propelled howitzers and rocket launchers are in position. This clearly pleases HQ, who orders the Air Raider to mark targets, saying that the bugs will "break into thousands of pieces."

At the end of the mission the Operator, a rather excitable young woman, announces that "information" has leaked to the media. This shocks the normally unflappable Tactics Officer, but she soon recovers, stating that the information has already been publicly announced. HQ grumbles that they would have found out sooner or later anyway. The precise nature of this information is not revealed until the next mission.

4.1 Changes Edit

Oddly for a mission that would make sense if numerous NPC vehicles and some airstrikes were added, just one E551 Gigantus is added to this mission accompanying the Ranger unit. Since it drives right into the mass of Spiders, it is usually destroyed before really doing anything of note. It does take place in the exact same area of City 2 as 4.1's version of Reconvene, however, with the Spiders spawning roughly where the second and fourth waves of Ants appeared before, so it benefits from familiarity.

Enemies Edit

2025:

2 waves of Spiders, 38, 59.

4.1:

2 waves of Spiders, 54, 59.

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 470 467 285 283 588 584
Hard 1596 1624 848 862 1995 2030
Hardest 3064 3592 1582 1892 3830 4491

Weapon Level Limit

Game Easy & Normal Hard Hardest Inferno
2025 3 26 51 81
4.1 3 26 54 83

Approximate Weapon Drop Rate

Game Easy Normal Hard Hardest Inferno
2025 0-1 0-1 9-21 0-46 0-53
4.1 0-1 0-1 11-26 0-47 0-53

Strategy Edit

Both Versions Edit

20160913083859 1

A Wing Diver moves to prevent the initial group of Spiders from spidering her friends.

Sadly there is no such thing as an NPC Air Raider in either game, and so unless there is a player character Air Raider present with the relevant gear, the introductions are just for show. Otherwise, this mission is a fairly straightforward battle against two waves of Spiders, one nearby and then a larger one some distance away, each spawning with a group of civilians to spider at for a while before they direct their attention to Storm Team and the Ranger Team.

This is a good mission to use area-effect weapons since the Spiders like to bunch up, but it is essential to keep a close-range weapon to hand to deal with those that manage to get near. The suggestion of using Air Raider support is a good one, and dropping artillery on groups before they have finished with their civilian friends is an excellent way to thin out the swarm.

Because the first wave of Spiders spawns very nearby, even though they have a perfectly good group of civilians to menace, some may decide that the Rangers and Storm Team are being left out and come over to give them a good menacing too. They will use long, low jumps to close range, often landing to the sides or behind if Storm Team stay in their starting location. Good situational awareness and an eye on the radar are needed to avoid very powerful close-range attacks from errant Spiders.

The second wave spawns near the top of the park, ahead and to the right of the starting location. It is a good idea to head right from where the first group of Spiders started out rather than heading out into the park, since the Spiders like to jump on the park's overhead walkways and then crawl under them to attack from the ceiling. The narrow space funnels their thread attack and makes it more dangerous and harder to avoid. Going right also means attacking one flank of the second wave rather than having most of it attack at the same time, and keeps the number of Spiders manageable.

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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