Corridor Sigma

Corridor Sigma

Matt Aufderheide · May 4, 2022 · Action, Shooter, FPS, Exploration, Shoot 'Em Up

Buy the Corridor Sigma key for Steam from Eneba at $0.43 — the cheapest of 3 stores we compare.

PC
Mixed69% · 16 📈 Making a comeback 77%
Best price 64 Lowest tracked
$0.43-57%
⭐ lowest tracked
Eneba Buy at Eneba

Prices last checked

More games under $5 →

Where to buy Corridor Sigma — official stores

Steam
Steam
Standard Edition · Steam
$0.99
Buy

Cheapest Corridor Sigma keys — keyshops

Keyshops are third-party marketplaces — keys are resold and can be region-locked or a different edition. Check the listing's region & edition before buying.

Eneba
Standard Edition · Steam
$0.43
Buy
Kinguin
Standard Edition · Steam
$0.51
Buy

Corridor Sigma price by region

Corridor Sigma costs £0.19 in the United Kingdom, €0.22 in Europe (EUR), $0.43 in the United States, $0.43 in Georgia (USD), zł1.23 in Poland, CA$1.29 in Canada, A$1.40 in Australia, NZ$1.49 in New Zealand and R$3.49 in Brazil right now.

Cheapest Corridor Sigma offer in each region, in local currency
RegionBest priceOfficial storeKey shopStores
United Kingdom £0.19 −79% £0.89 £0.19 2
Europe (EUR) €0.22 −78% €0.99 €0.22 3
United Statesyour region $0.43 −57% $0.99 $0.43 3
Georgia (USD) $0.43 −52% $0.89 $0.43 3
Poland zł1.23 −70% zł4.10 zł1.23 2
Canada CA$1.29 CA$1.29 — 1
Australia A$1.40 A$1.40 — 1
New Zealand NZ$1.49 NZ$1.49 — 1
Brazil R$3.49 R$3.49 — 1

Each row is a real price from that region's own stores, not a currency conversion, so the figures are not directly comparable. Switch regions in the header to shop the one you buy in.

Screenshots

About Corridor Sigma

Fight your way out of a sprawling alien base in this 90's-style first-person shooter. Features modern graphics with fast old-school action. Explore 20 levels and kill everything in them.

Corridor Sigma — game info

Platforms
Windows
Player modes
Single-player
PC Game Pass
Not included

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

✦ AI summary

Corridor Sigma is a retro-inspired old-school FPS with decent enemy variety and satisfying ragdoll physics that appeals to players nostalgic for classic shooters, though it suffers from repetitive level design, minimal story or polish, and questionable asset quality that makes it feel like a bare-bones product. Players appreciate the alien creature designs and occasional fun boss encounters, but note frustrating level navigation and a general lack of intelligent game design.

Recommended Sep 7, 2026
Okish simple old school fps. Every level basically looks and plays the same, the game is very repetitive. But for the price, it's ok.
3 found this helpful
Not recommended Aug 26, 2025
this is underrated
2 found this helpful
Recommended Jun 22, 2026
Interesting alien creatures designs, final level boss was fun to fight against. lvl 18 was annoying to find the exit haha.
1 found this helpful
Not recommended Jul 30, 2025
Corridor Sigma is a fairly basic Unity asset flipped first person shooter, one of many hundreds, if not thousands of these glutting Steam. The "developer" paid for/pirated a few Unity asset store assets, arranged them haphazardly in a simple first person shooter game template, and submitted it to Valve as if they're real game developers. This is really lazy as far as "Digital Homicide" style asset flips go, a couple of half-baked FPS levels with the same asset monsters popping up that you shoot with ploddingly high TTK. No polish, balance, no story, no plot, no intelligent game design went into this, much as all asset flips, this is just a minimum viable product intended to pass the negligible "QA" Valve attaches to Steam Direct. Two notable criteria for what makes an asset flip instead of legitimate use of stock assets are whether those assets comprise the majority of the game, and whether the "developer" properly credited the people who created most of the assets in the game. This game fails both of those tests. The "developers" here didn't credit any of the artists and real, actual game developers who created the assets here, so this is plagiarism, as well as cash grab shov…
1 found this helpful
Recommended Jun 26, 2026
Corridor Sigma is a straightforward science fiction first-person shooter that proudly embraces the design philosophy of classic FPS games rather than chasing modern trends. Developed by Matt Aufderheide and published by SA Industry, it offers an experience centered on speed, exploration, and constant combat inside a mysterious alien installation. Instead of relying on cinematic storytelling or elaborate progression systems, the game immediately drops players into a dangerous environment where survival depends on quick reactions, efficient movement, and effective use of an expanding arsenal. Its old-school approach is unmistakable, making it an appealing choice for players who appreciate the simplicity and intensity of retro-inspired shooters. The campaign unfolds across twenty handcrafted levels that encourage both exploration and aggressive firefights. Each stage is filled with interconnected corridors, hidden pathways, and hostile alien lifeforms waiting to ambush unsuspecting players. While the game's narrative remains intentionally minimal, the environments themselves create enough atmosphere to maintain curiosity as players venture deeper into the complex. Secret areas reward…
Recommended Apr 10, 2026
It tickled the part of my brain that enjoys nostalgic Quake-like shooters. The graphics are really the best thing about it, but it's also cool that there are real ragdoll physics and dodgeable projectiles. No idea if this was made in game making software or unique code, or if they are reused assets, but it's got the mood and feel perfect. There' a ton of enemy types, from bipedal scaley weirdos to turrets and little critters that skitter across the roof. "Corridor Sigma" uses ragdoll physics, so when you blast that half-dinosaur "thing" in the face it will explode into chunks or its body will fly across the room, which is cool. Unfortunately the game drops the ball on design. There are a ton of weapons, which is great, but you never really need to hunt down ammo. You can run straight to the exit, even on hard, in all but the last level. I beat the entire game in ten minutes. There's statistical tracking for enemies killed, ammo picked up and secrets found, but there are no achievements and it doesn't seem to have any bearing on anything. Since the game highlights the exit, you need only run in that direction and you will find it, the level will end and you can start the next one w…

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