KILLAMITY is a compact, neon-soaked retro first-person shooter that turns a botched Necronomicon reading into a full-blown demonic shooting gallery. You start with a humble revolver and end up as an unstoppable engine of destruction, blasting through arenas of hellspawn in a campaign that runs roughly 45 minutes and caps off with a ludicrous boss showdown. If you want a short, adrenaline-pumping burst of glorious carnage with a B-movie horror sense of humor, this one is built for exactly that.
You can grab the game through the direct GOG installer linked below. It is a one-click install and play setup, and the download is completely free.
Technical Specifications
| Version | Estimated current release (version not specified by publisher) |
| File Size | 1.66 GB |
| Operating System | Windows / Linux |
| Category | DRM-Free PC Games |
| License | Free |
| Developer | GOG Unlocked |
About KILLAMITY
Dive into a chaotic neon nightmare where hell is transformed into a wild shooting gallery, thanks to a botched Necronomicon reading. This compact retro FPS delivers a thrilling ride, allowing players to evolve from a humble revolver wielder into an unstoppable force of destruction. The gameplay focuses on fast-paced, action-packed battles where you must eliminate demons to clear arenas and progress through a roughly 45-minute campaign culminating in a ludicrous showdown.
The game embraces a tongue-in-cheek B-movie horror vibe, filled with gore and humor rather than serious lore. Unique features include a robust upgrade system with no limits, allowing players to create over-the-top builds, and an Endless Mode for testing those builds against relentless waves of enemies. While it may not offer the intricate mechanics of more polished shooters, it’s perfect for gamers craving a short, adrenaline-pumping experience where you can unleash glorious carnage.
Key Features
- Fast-paced arena combat: Clear rooms of demons to advance through the campaign, with movement and shooting kept front and center.
- Weapon evolution: Start with a basic revolver and grow into an unstoppable force of destruction as you progress.
- Unlimited upgrade system: Build over-the-top loadouts with no caps, letting you stack upgrades into absurd combinations.
- Endless Mode: Test your finished builds against relentless waves of enemies after the campaign is done.
- Short, focused campaign: Roughly 45 minutes of action that ends in a deliberately ludicrous boss showdown.
- B-movie horror tone: Gore and humor over serious lore, leaning into the schlocky side of demonic horror.
- Retro neon presentation: A chaotic neon-nightmare aesthetic that matches the arcade-style shooting.
Gameplay and Design
KILLAMITY is structured around arenas. You enter a space, demons spawn, and you eliminate them to clear the room and move on. That loop is the spine of the whole experience, and it keeps the pace high because there is very little downtime between fights. The weapon progression gives that loop a sense of momentum: the revolver you start with is a modest tool, but the upgrade path lets you turn it, and your overall kit, into something far more aggressive.
The upgrade system is the standout idea here. Because it has no limits, you can push your build into territory that more balanced shooters would never allow. That is the point. The game is not trying to be a tightly tuned competitive shooter; it is trying to let you feel like an overwhelming force. Endless Mode exists specifically so you can take those stacked builds and see how far they carry you against escalating waves.
The campaign itself is short by design, around 45 minutes. That length works in the game's favor if you want a quick, self-contained burst of action rather than a long commitment. The finale is described as a ludicrous showdown, which fits the overall tone: this is a game that knows it is a B-movie and leans into it.
Who It Is For
KILLAMITY suits players who enjoy retro-style first-person shooters, arcade arena combat, and short experiences they can finish in a single sitting. If you like building absurd upgrade combinations and then stress-testing them against waves of enemies, the unlimited upgrade system and Endless Mode are aimed directly at you. If you prefer deep lore, intricate mechanics, or a long narrative campaign, this is not that kind of game, and the input description is upfront about it.
If you enjoy compact DRM-free shooters, you may also want to look at Floating Frontiers Free Download for another short-form action option in the same download category.
Pros & Cons
- Pros:
- Fast, focused arena shooting with almost no filler.
- Unlimited upgrade system encourages over-the-top builds.
- Endless Mode adds replay value beyond the short campaign.
- Distinct B-movie horror tone with gore and humor.
- Small 1.66 GB download and quick install.
- Cons:
- Roughly 45-minute campaign is very short for players who want longevity.
- Lacks the intricate mechanics of more polished shooters.
- Linux support may have issues, per the game's own notes.
- Humor and gore are central, so it will not appeal to everyone.
System Requirements
- OS: Windows 11
- Processor: Ryzen 5 5600G
- Graphics: GeForce GTX 1660 SUPER
- Storage: 2 GB available space
- Additional Notes: May have trouble with Linux devices
Note that the listed OS is Windows 11 while the metadata lists Windows / Linux. The game's own notes flag possible trouble on Linux devices, so keep that in mind if you plan to run it there.
Installation Instructions
- Click the Download button below and you will be redirected to UploadHaven.
- Wait 5 seconds and click on the blue “download now” button. We recommend using a download manager for faster download speeds. (You can use FDM which is free here, or any other download manager).
- Once the game is finished downloading, right click the .zip file and click on “Extract to KILLAMITY.zip” (To do this you will need 7-Zip, which you can get here, or you can use the built in windows extractor).
- Double click inside the KILLAMITY folder and run the setup application. Accept the EULA, and install the game. Then, launch the game through the desktop shortcut.
Trust Signals and Version Freshness
The download is served through UploadHaven, and the file size is 1.66 GB, which matches the size listed on the download button. The publisher listed in the metadata is GOG Unlocked, and the package is described as a direct GOG installer with a one-click install and play flow.
No version number is provided by the publisher, so treat any version reference as an estimate rather than a confirmed build. Before you install, confirm the file size after download matches 1.66 GB, and make sure you have at least 2 GB of free space on the target drive. If you want to support the developers, the reminder below links to GOG where you can purchase the game legitimately.
Reminder: This download is completely free and won't cost you a penny. However, If you love the game and want to purchase it, you can support the developers by doing so here.
Screenshots
KILLAMITY Free Download
Download KILLAMITY — Size: 1.66 GB
If you are looking for other DRM-free titles in this category, you can browse Naruto: The Broken Bond Free Download or Put Your Toys Away Together! Free Download.
Frequently Asked Questions & Setup Guide
Q: My antivirus flagged one of the files as a threat. Is this game safe?
A: Yes, all files on our site are 100% verified clean. Antivirus software may occasionally flag steam_api.dll or crack files as false positives due to modified game binaries. Temporarily whitelist the game directory before extracting.
Q: I get a missing DLL error (e.g., VCRUNTIME140.dll, MSVCP140.dll, or D3DCOMPILER). How do I fix it?
A: Missing DLL errors indicate missing Windows system libraries. Ensure you have installed the latest Visual C++ All-In-One Redistributables and the latest DirectX runtime.
Q: Where are my game save files located?
A: Saves are usually stored in your %APPDATA%, %LOCALAPPDATA%, or Documents/Saved Games folder. Always run the game as Administrator so it has permission to save your progress properly.
Q: Can I play online or multiplayer with friends?
A: If this title includes co-op or online support, follow the specific multiplayer instructions included inside the game folder (usually requires having the Steam client running in the background).
