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[[caption-width-right:350:[[VideoGame/MischiefMakers Merco]] is under attack from [[WesternAnimation/LooneyTunes Wile E. Coyote]] riding [[WesternAnimation/{{Bravestarr}} Bravestarr's]] horse. [[WidgetSeries This is a Japanese game, isn't it?]]]]

--> '''Japanese title screen''', immediately [[CrazyAwesome setting the game's tone]]

''Alien Soldier'' is a 1995 RunAndGun game by Creator/{{Treasure}} for the UsefulNotes/SegaGenesis. While it shares some similarities with other run-and-guns, the focus here is on lightning fast reflexes instead of using the strongest weapon avaliable. You play as Epsilon-Eagle, a cybernetic birdman who fights against the rogue organization Scarlet, travelling throughout the galaxy and leaving large amounts of carnage in your wake.

The plot, [[ExcusePlot if it even matters]], concerns a criminal organization of genetically-engineered beings called "Scarlet" who terrorized the planet Sierra. Their members are able to live within humans, animals and machines via a parasitic ability. Epsilon-Eagle, the leader of Scarlet, was ambushed by a team of Sierrans with super powers, and [[TechnoBabble thrown into the space-time continuum]]. The new leader of Scarlet, Xi-Tiger, was [[ZeroPercentApprovalRating hated by his own men]] for being too [[BloodKnight ruthless]] compared to Epsilon, and as such he wanted to destroy Epsilon once and for all. Xi-Tiger attacked a Sierran research laboratory where he sensed Epsilon in the body of a boy. He took a random girl hostage so as to force Epsilon to come out. Epsilon, instead, [[ViralTransformation transformed from a boy into a cyborg birdman]]. However, Epsilon's [[HumansAreGood good human side]] [[HeroicWillpower began to overcome his evilness]] and made him want to [[Fanfic/DoomRepercussionsOfEvil fight the demons]]. This annoyed Xi-Tiger, who killed the girl before running away. The plot actually makes even less sense as it proceeds, with the planet blowing up and Epsilon ending up fighting a giant mechanical lion called Z Leo without the player really having any idea who he is or why this is necessary.

Of course, none of that actually matters. What does matter is lots of explosions, sick Genesis music, a badass and super powerful main character and lots and lots of bosses. More than twenty of them to shoot, in fact.

Epsilon's a handy fellow, able to carry four weapons at a time. Each one of these can be chosen from a list at the start of the game:
* Buster Force, a [[MoreDakka standard, rapid no-nonsense blaster]] which starts bouncing off everything about halfway though the game.
* Flame Force, a [[KillItWithFire short-ranged flamethrower]]. The boss-killer.
* Homing Force, which fires [[{{Roboteching}} homing flames]], and is probably the best general-use weapon until late in the game.
* Ranger Force, a [[AwesomeButImpractical slightly useless]] [[SpreadShot spread gun]].
* Sword Force, a [[BeamSpam rapid but weak laser]].
* Lancer Force, a better laser that uses more ammunition. The other boss-killer.

Epsilon-Eagle has several unique abilities at his disposal, including a dash-like teleportation, levitation, a bullet-neutralizing shield, as well as a CeilingCling. All of these require the player to be on their toes, as waves of enemies and powerful bosses come after them.
!!This work contains examples of:
* ZeroPercentApprovalRating: Xi-Tiger, the new leader of Scarlet. He's hated by his own comrades due to being [[BloodKnight too ruthless]] towards the Sierrans, tries to kill off his old deposed leader, but what takes the cake is that he takes an innocent girl hostage AND KILLS HER. When you fight him, he literally transforms himself into a monster tiger.
%%* AbsurdlySpaciousSewer
* AirborneMook: The flies that flew round in random circles, then shot at you and kamikazed into you. Hope you have the Homing Force ready...
** Those bomb-dropping birds can be a pain in the ass too.
** As well as those things that travel in long lines and explode into suicide bullets, found at only one part of the game. A smart player can use the BulletCatch ability to turn their bullets into health.
* AllThereInTheManual: The confusing plot, such as it is, is outlined there. Did you know children can turn into birdmen if they're posessed and pissed off enough, or that a clone of a birdman might be a giant metal bird with laser wings?
** The properly-translated version of the rom does tell the story properly in the intro.
* ArbitraryMaximumRange: All weapons except for Lancer get this as their ammunition goes lower.
* AttackItsWeakPoint: All bosses have a weak spot, where you must hit if you want to do big damage to them (or even damage them at all).
** Some of the enemies are even more bizarre: they have a different weak spot against different weapons. For example, [[NinjaPirateZombieRobot Wolfgunblood's]] head is weak to fire weapons and the Buster Force, while [[MechanicalHorse Garopa's]] head is weak to the Lancer Force. Though Homing Force says the target on Wolfgunblood is [[GroinAttack somewhere else entirely]].
* AwesomeButImpractical: Ranger, and to a lesser extent, Sword.
* BadassBoast: The engrish laden quote in the title screen (replicated at the top of the page) is essentially this, as it was the tagline for the Japanese campaign of the console. Treasure's usage of the tagline, along with the line "For Megadrivers custom" is their way of saying Alien Soldier [[TechDemoGame was tailor made]] [[TechnologyPorn to push the Megadrive and its Motorola 68000 CPU]] to its absolute limits.
* BearsAreBadNews: Averted by the aformentioned teddy bear, who is the only ally you'll get the whole game. The track that plays during his stage is even named ''Epsilon's Ally''.
* BigCreepyCrawlies: Quite a few, such as Antroid, Bugmax (a moth), Viblack (a giant fly) and [[GiantSpider Back Stringer]] (which [[TrickBoss unceremoniously eats the former]]).
* BirdPeople: Epsilon-Eagle.
* BlackoutBasement: One of the levels takes place in complete blackness save for a few background lights- you have to use your MuzzleFlashlight to light it up.
* BossArenaUrgency: [[GiantSpider Back Stringer]]. If the baby spiders pull the remains of the previous boss, Viblack (a.k.a. the platform you're standing on), to the bottom of the screen until it disappears, you'll keep falling into the [[NonLethalBottomlessPits bottomless pit]] OVER AND OVER AGAIN (read: GameOver)!
* BossGame: Stages are generally short, with only a handful of enemies at a time in the spaces between one boss and the next. Currently, it's second only to VideoGame/{{Cuphead}} for "Most boss battles in a RunAndGun game", at 25: as ''Sega Power'' put it: "There are bosses and bosses and bosses. Even the bosses are bossed about by other bosses."
* BottomlessMagazines: Averted. Limited ammunition for your strongest weapons is one of the largest threats you face. It only recharges when you collect a new weapon, or switch to a different one.
* BulletCatch: Epsilon-Eagle's main defensive ability. Hit the shoot button twice to create a small forcefield that turns enemy fire into health. Make sure you don't do this with a Lancer equipped, though, since doing so wastes its already-limited ammo and cancels the shot to boot.
* CameBackWrong: You know that girl that died in your failed attempt to save her? Not only does she became one of the game's bosses, she's freaking ''[[VideoGame/GunstarHeroes Seven Force]].''
* {{Cameo}}: Melon Bread (referred to in this game as "Jampan") and Seven Force, both markedly different from their ''VideoGame/GunstarHeroes'' incarnations.
* CastFromHitPoints: At full health (health bar flashing white), Epsilon-Eagle can utilize a fiery teleport-dash which destroys any {{Mooks}} in its path as well as heavily damaging bosses. However, this attack does come at the cost of a few hit points, so you need to collect the rather [[HelpfulMook frequently-dropped]] health powerups.
* CeilingCling: Epsilon-Eagle's other main ability.
* CherryTapping: Run out of ammo from one of your weapons and it becomes a weak-as-hell "yellow short-range smoke" shot thing. You can still use it to defeat bosses. It's one of three ways to damage the FinalBoss (the other two being [[TennisBoss shot reflection]] and your fiery dash which you can only use once against him).
* CollisionDamage: Just about every enemy save for some bosses.
* ContinuingIsPainful: Using a continue or password removes extra ammunition and health.
* CreepyChild: [[spoiler:That girl that Xi-Tiger is said to have killed in the opening text scroll? She shows up as a late game boss.]]
* CrosshairAware: When using the Homing Force, a crosshair will appear on the boss' weak spot.
** Epsilon-1 also has these during the boss fight against him. Get out of the way or else you'll be blasted by the mecha bird's EyeBeams or a laser from a KillSat.
* CriticalExistenceFailure: Both [[PlayerCharacter Epsilon]] and his opponents don't show any signs of tiredness or damage at low health.
** Especially egregious when Epsilon has been reduced to ''[[HpToOne one hit point]]''- he looks perfectly fine until he gets hit again, after which he [[MadeOfExplodium explodes in a fiery mess]].
* DiscOneFinalBoss: The game continues even after Xi-Tiger is defeated.
* DoNotRunWithAGun: You can switch to and away from fixed-fire mode, though the moving-fire mode drains more weapon power.
* DramaticThunder: In the boss battle with Xi-Tiger.
* DubNameChange: The terms "A-Earth" and "A-Human" are changed to "Sierra" and "Sierrans" in the European version.
* EarthShatteringKaboom: The planet literally blows up about halfway through the game. Then, um...Well, it's not really that clear.
%%* ElevatorActionSequence
* TheEndOfTheWorldAsWeKnowIt: [[spoiler:Sierra inexplicably blows up partway through the game. It gets better.]]
%%* EternalEngine
* EverythingTryingToKillYou: Except for a blue teddy bear.
* EvilCounterpart / EvilTwin: Epsilon-1
* EvilIsVisceral: Nearly all the enemies and bosses until the last few bosses are this.
%%* ExplosionsInSpace
* ExtyYearsFromNow: The game was made in 1995, and takes place in the [[SarcasmMode distant future]] of 2015.
* FaceHeelTurn: [[spoiler:The girl you failed to save in the beginning.]]
%%* FreefallFight: Silpheed Force.
%%* FrickinLaserBeams: Sword and Lancer.
* GiantEnemyCrab:
** Madam Barbar, who walks on the ceiling and [[MookMaker spawns smaller baby crabs]] that try to hold Epsilon in place.
** One of the bosses in the game is a giant lobster. He [[KickTheDog throws the poor blue teddy bear driving your boat overboard]]!
* GiantSpaceFleaFromNowhere: Almost everything. GiantEnemyCrab in an airport, [[NinjaPirateZombieRobot cyborg cowboy wolf]] riding a MechanicalHorse in a tunnel, etc.
%%* GiantSpider: Back Stringer.
* HeelFaceTurn: Epsilon does this in the game's intro.
* HelpfulMook: Any Mook that can fire those orange shots at the player. They will drop health pickups when their shots are destroyed via BulletCatch. [[NintendoHard You're going to thank them for that, by the way]].
%%* HighAltitudeBattle
%%* HighSpeedBattle
* HitPoints: You can choose to have this as an indicator to how much life you and/or the boss has.
* HorseJump: Wolfgunblood and Garopa use this as an "attack" when the low walls appear. You gotta avoid the walls too or risk getting damaged.
* HPToOne: [[LastChanceHitPoint No single attack can kill you outright]]; you must be reduced to one health first, giving you time to collect health. However, some attacks are rapid enough that you won't have a chance for this.
* IdiosyncraticDifficultyLevels: Superhard and Supereasy. Even though the latter is anything but; enemies are less tough, you receive unlimited continues (via a password system) and get an option to slow the game speed down.
* IntentionalEngrishForFunny: For a time, this was the only playable ROM.
** The tagline quoted at the top of the page, which is apparently touting what Treasure could squeeze out of the UsefulNotes/SegaGenesis' Motorola [=MC68000=] [[UsefulNotes/CentralProcessingUnit CPU]] in terms of [[SceneryPorn graphics]], framerate, and sound quality.
** [[http://www.youtube.com/watch?v=erOuaYQ3jkk It's actually the japanese Mega Drive tagline, from even early on in the console's lifespan.]]
* InvisibleMonsters: Flying-Neo, a creature that looks like a cross between a [[NinjaPirateZombieRobot zombie dragon and a helicopter]]. Once you get him down to a [[TurnsRed quarter of its health]], the goddamn thing becomes ''completely invisible'' save for a silhouette of its tail and legs on the platform you're on when it flies low or when the lightning strikes.
* KillItWithFire: You get two flamethrowers; a conventional one, and a homing flamethrower. Fire works very, very well on organic enemies, especially that giant plant Sunset Sting.
* LandMineGoesClick: Mines, both on the ground and floating in midair, are a common obstacle.
* LastChanceHitPoint: [[NintendoHard And you're gonna need it.]]
* LifeMeter: One of the selectable ways to know how much life left that you have or the enemy has. If desired, you can turn them off.
* LightningReveal: Done in the fight against Flying-Neo. Once you get it down to a quarter of its health, it [[InvisibleMonsters turns invisible]]. The background flashes of lightning will give away its silhouette, though.
%%* LoadBearingBoss
* LogoJoke: The Sega logo appears and dissipates against a space background, along with the Treasure logo.
* LowClearance: One of Wolfgunblood and Garopa's "attacks" involves the horse signalling to a warning ahead. Shortly after, it'll either jump or lower itself to avoid 2-4 high or low incoming walls, and if Epsilon doesn't move high or low to avoid he'll take collision damage from them.
* MeaningfulName:
** [[NamesToRunAwayFromReallyFast Wolfgunblood]] and Garopa: If you think it's a '''wolf''' who wields a '''gun''', is out for your '''blood''', and is riding on a '''galloper''', you're damn right.
** Sniper Honeyviper: It looks like a snake, and it sends out [[BeeBeeGun bees]]. Thankfully it can't give you headshots.
** Antroid: Ant + Android, it is indeed a giant humanoid ant.
** [[GiantSpider Back Stringer]]: Being a spider, it strings things up. On their backs, presumably.
** [[TurtlePower Shell]][[{{Samurai}} shogun]]: A bipedal alien samurai tortoise. Enough said.
** [[SequentialBoss Seven Force]]: See below.
* MechanicalHorse: Wolfgunblood rides one of these.
* MixAndMatchCritters: From half man, half eagle to half lion and half [[HumongousMecha mecha]]
* MuzzleFlashlight: You're going to have to utilize this in the BlackoutBasement stage.
* NinjaPirateZombieRobot: Many of the bosses:
** Shellshogun: A giant alien [[TurtlePower tortoise]] {{samurai}}.
** Flying-Neo: An alien [[EverythingsDeaderWithZombies zombie]] [[OurDragonsAreDifferent dragon]] helicopter that [[InvisibleMonsters turns invisible]] once its health is low.
** Wolfgunblood & Garopa: An anthropomorphic cyborg cowboy wolf with a [[MoreDakka machine-gun]] ArmCannon that rides on a MechanicalHorse. See the picture at the top of the page.
* NintendoHard: Even on the easiest difficulty, the game is [[NintendoHard obscenely hard]] in Treasure tradition.
* NonLethalBottomlessPits: Somewhat. Falling into a pit will trigger a button-mashing sequence to get out while your health drops at a steady rate.
%%* OneManArmy
%%* OutrunTheFireball
%%* PainfullySlowProjectile
* PainfulTransformation: Xi-Tiger. Though the cutscene showing this sometimes doesn't work.
* PowerFloats: Epsilon-Eagle's ''other'' other main ability. Hit the jump button in midair to do this.
%%* RatchetScrolling
* RingMenu: The action does not stop while this is open.
* RuleOfCool: Wolfgunblood is a [[NinjaPirateZombieRobot anthropomorphic cyborg cowboy wolf]] with a [[GatlingGood gatling]] ArmCannon, riding on a MechanicalHorse, Garopa. It's one of the [[GiantSpaceFleaFromNowhere strangest boss fights]] in the game. See the picture at the top of the page.
* SelfImposedChallenge: During the initial weapon selection and configuration, the player has the option to make all information about his health, ammunition and boss health into '???', essentially preventing the player from tracking how much damage was taken or dealt or how much ammo they have left.
* SequentialBoss: Seven Force, which only has six forms (including the human form she starts in). This is because the "Seven" is a reference to the Mode 7-style rotation effects the boss showcases, not the number of forms it has.
** It was originally supposed to have seven forms (most likely excluding the human) according to the head developer, though; they [[WhatCouldHaveBeen were cut along with some other planned content in favor of releasing the game sooner.]]
* ShoutOut: The apocalyptic premise of a [[HeroicWillPower counter]]-[[DemonicPossession possessing]] hero with a [[StuffedIntoTheFridge tragic love interest]] battling a horde of in-fighting monsters is an homage to ''[[Manga/{{Devilman}} Devilman]]''. Now with a [[RecycledInSpace sci-fi backdrop]].
* ShownTheirWork: The developers made it such that fire attacks don't work underwater when fighting against Sirene Force. [[ExplosionsInSpace Fire still works in space]], though.
%%* SpaceZone
* SpreadShot: The Hunter Force. Pity it was kind of useless from the beginning...
* StatMeters: Upon startup, you can choose how your health, your ammunition, and the bosses' health meters are displayed. They can be made invisible, even.
%%* StrongFleshWeakSteel
%%* StuffBlowingUp
* SuperNotDrowningSkills: Subverted during the AbsurdlySpaciousSewer stage. If you fall into the water, you have to do a button-mashing sequence to get out as your health rapidly drops. Played straight against [SequentialBoss Sirene [Force]].
* TacticalSuicideBoss: [[BigCreepyCrawlies Bugmax]] in its [[GiantFlyer moth form]]. The dumb thing [[MookMaker drops A LOT of caterpillars]] on the floor, which you can [[BossArenaRecovery destroy for health]]. Allowing you to use your full health-only, CastFromHitPoints [[RammingAlwaysWorks fiery]] [[TeleFrag teleport]] move effortlessly on it. MULTIPLE TIMES.
* TeleportSpam: Epsilon-Eagle's ''other'' [[RunningGag other other]] main ability. At full health, [[{{Telefrag}} he turns into a firey phoenix that inflicts a great deal of damage to those in his path]], although it does come at a [[CastFromHitPoints cost to his health]].
* TennisBoss: In order to defeat Z-Leo, the FinalBoss, you must use your [[BulletCatch bullet cancel]] ability to knock his spiralling fireballs back into his head.
* ThreateningShark: Deep Strider
%%* TimedMission
* TraintopBattle: Most notably the boss battle with Xi-Tiger.
%%* UndergroundLevel
* UnderwaterBossBattle: Siren Force.
* WordSaladTitle: Sniper Honeyviper, Wolfgunblood & Garopa, and a few others.
%%* {{Zeerust}}