Compare Alien Shooter prices across trusted key stores and find the best deal. Developed by Sigma Team Inc.. Published by Sigma Team Inc.. Released on 5/27/2009. Available on PC. Genres: Action, Indie, RPG.

Sigma Team's isometric horde-slayer from 2003 still earns a 94% positive rating on Steam, and once you feel the first teleporter open and a hundred creatures flood the screen at once, you'll understand why.

I keep a handful of games on standby for when the brain just needs to switch off and let muscle memory run the show, and Alien Shooter has quietly held one of those slots for years. It is a top-down isometric shooter set inside a military complex overtaken by alien creatures, and its loop is stripped to its purest form: move, aim, kill, loot, spend cash at the between-level shop, repeat. There is no pretense of story weight here. The appeal is entirely physical, almost rhythmic, and it works. The structure spans nine levels of increasing size and monster density, with objectives like reactivating power generators, blasting through sealed walls, and hunting down teleporter devices that pour enemies indefinitely until destroyed with explosives. That last mechanic is where the game earns its teeth. Teleporters create genuine pressure: do you push through the horde to reach the device, or burn resources holding the line until you find an angle? The answer changes depending on how you have built your character across the four stats, Strength, Accuracy, Health, and Speed, and which weapons you have purchased. The shotgun shreds clusters at close range, the minigun rewards accuracy investment, the rocket launcher clears armored multi-arm aliens in tight corridors, and the freeze rifle is underrated for crowd control when cash is thin. Biomechanical implants add another layer, letting you push stats beyond their natural caps and bend toward a playstyle rather than just dumping points evenly. For a game this old and this compact, that is a surprising amount of decision-making embedded in what looks like pure chaos on screen. The three game modes, Campaign, Survive, and Gun Stand, each scratch a different itch. Campaign is the main event. Survive strips away objectives and just asks how long you last. Gun Stand is a stationary turret mode that plays almost like a different game entirely. The male or female character choice is purely cosmetic but a small gesture I appreciate. The Steam version also lets you toggle between red and green blood, which is a detail so charmingly specific to its era that it made me smile. The honest criticism is the one GameSpot handed down years ago and it has not aged out: repetition is the wallpaper. The environments are corridors and labs dressed in the same dark palette across all nine levels. Enemy variety exists but the dominant sensation is always the same brown-green mass rushing the screen. A known technical quirk with vsync off can also break the camera tracking, which feels like a rough edge that should have been patched long ago. If you need environmental storytelling or mechanical escalation that keeps surprising you past hour three, this is not the place to look. But here is what I think people miss when they dismiss it: Alien Shooter knows exactly what it is and never tries to be more. It is a short, dense burst of old-school arcade energy with just enough RPG scaffolding to make each run feel slightly personalized. The pacing is honest. The horde density is genuinely impressive even by modern standards. And the reactive soundtrack does something quiet but effective, shifting in intensity as the screen fills. For anyone drawn to the Diablo loop of clearing rooms and reinvesting earnings into more destructive tools, this scratches that same itch at a fraction of the runtime. Kai, Scout Team

Alien Shooter

Alien Shooter

May 27, 2009Sigma Team Inc.
GamerScout Says

Sigma Team's isometric horde-slayer from 2003 still earns a 94% positive rating on Steam, and once you feel the first teleporter open and a hundred creatures flood the screen at once, you'll understand why.

PC
Steam Deck UnsupportedProtonDB Platinum
Best Price Available
€0.00
at N/A
Historical low: €1.50

GamerScout Verdict

Best for arcade-RPG fans who want a tight, low-commitment horde loop and do not mind corridors that all look the same.

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Price History

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€1.505 Jun 2026
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About Alien Shooter

I keep a handful of games on standby for when the brain just needs to switch off and let muscle memory run the show, and Alien Shooter has quietly held one of those slots for years. It is a top-down isometric shooter set inside a military complex overtaken by alien creatures, and its loop is stripped to its purest form: move, aim, kill, loot, spend cash at the between-level shop, repeat. There is no pretense of story weight here. The appeal is entirely physical, almost rhythmic, and it works. The structure spans nine levels of increasing size and monster density, with objectives like reactivating power generators, blasting through sealed walls, and hunting down teleporter devices that pour enemies indefinitely until destroyed with explosives. That last mechanic is where the game earns its teeth. Teleporters create genuine pressure: do you push through the horde to reach the device, or burn resources holding the line until you find an angle? The answer changes depending on how you have built your character across the four stats, Strength, Accuracy, Health, and Speed, and which weapons you have purchased. The shotgun shreds clusters at close range, the minigun rewards accuracy investment, the rocket launcher clears armored multi-arm aliens in tight corridors, and the freeze rifle is underrated for crowd control when cash is thin. Biomechanical implants add another layer, letting you push stats beyond their natural caps and bend toward a playstyle rather than just dumping points evenly. For a game this old and this compact, that is a surprising amount of decision-making embedded in what looks like pure chaos on screen. The three game modes, Campaign, Survive, and Gun Stand, each scratch a different itch. Campaign is the main event. Survive strips away objectives and just asks how long you last. Gun Stand is a stationary turret mode that plays almost like a different game entirely. The male or female character choice is purely cosmetic but a small gesture I appreciate. The Steam version also lets you toggle between red and green blood, which is a detail so charmingly specific to its era that it made me smile. The honest criticism is the one GameSpot handed down years ago and it has not aged out: repetition is the wallpaper. The environments are corridors and labs dressed in the same dark palette across all nine levels. Enemy variety exists but the dominant sensation is always the same brown-green mass rushing the screen. A known technical quirk with vsync off can also break the camera tracking, which feels like a rough edge that should have been patched long ago. If you need environmental storytelling or mechanical escalation that keeps surprising you past hour three, this is not the place to look. But here is what I think people miss when they dismiss it: Alien Shooter knows exactly what it is and never tries to be more. It is a short, dense burst of old-school arcade energy with just enough RPG scaffolding to make each run feel slightly personalized. The pacing is honest. The horde density is genuinely impressive even by modern standards. And the reactive soundtrack does something quiet but effective, shifting in intensity as the screen fills. For anyone drawn to the Diablo loop of clearing rooms and reinvesting earnings into more destructive tools, this scratches that same itch at a fraction of the runtime.

Kai
Kai · Scout Team

Indie & narrative

Tags

singleplayerachievementstrading-cardscloud-savestier:indieHorde ShooterIsometric Top-DownStat AllocationBiomechanical ImplantsTeleporter DefenseThree Game ModesWeapon ShopArcade RPG LoopOld-School PC

System Requirements

Minimum

OS
Windows 2000 / XP / Vista
Sound
DirectSound compatible sound card
Memory
128 MB
Graphics
Direct3D compatible 3D graphics card with 32 MB RAM
DirectX®
7.0
Processor
400 MHz
Hard Drive
50 MB Free Space

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Game Info

Developer
Sigma Team Inc.
Publisher
Sigma Team Inc.
Release Date
May 27, 2009

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How much does Alien Shooter cost?

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What platforms is Alien Shooter available on?

Alien Shooter is available on PC.

When was Alien Shooter released?

Alien Shooter was released on 27 May 2009.

Who developed Alien Shooter?

Alien Shooter was developed by Sigma Team Inc..