That's not my Neighbor

Catch the Doppelgängers in That’s Not My Neighbor – Now on Linux

Welcome to the Doppelgänger Prevention Bureau

That's Not My Neighbor is a unique indie horror game developed by Nacho Sama, where players step into the role of a 1955 doorman employed by the Doppelgänger Prevention Bureau. The game blends psychological horror with observational puzzle mechanics in a way that challenges players to spot subtle inconsistencies and protect tenants from mysterious imposters.

Initially released on Steam with widespread acclaim for its art direction, paranoia-inducing gameplay, and analog horror aesthetic, the game has now expanded its support to Linux—bringing the nightmare to an even broader audience.

Now Natively Playable on Linux

Linux users can now fully immerse themselves in the surreal and unsettling world of That's Not My Neighbor. The game runs natively on Linux distributions, including Ubuntu, Arch, and SteamOS, with smooth performance and stable frame rates across various hardware configurations.

The game launches without the need for Proton or workarounds. Everything—from mouse input and hotkeys to interface scaling and sound—is fully functional. The minimalist pixel art style is perfectly rendered, and users report no visual artifacts or crashes during play. It’s a strong example of how indie horror can feel just as impactful and immersive on Linux.

Whether you're playing on a desktop or Steam Deck in Linux mode, the experience remains consistent. Thanks to full Steam integration, features like cloud saves and achievements are also supported.

Gameplay Overview

Each shift in That's Not My Neighbor presents you with a list of approved tenants, documents to verify, and a flow of visitors at the door. Some will be who they claim to be—others are doppelgängers using slight visual or behavioral differences to slip past your scrutiny. You must observe, compare, and decide who to let in.

With each passing day, the difficulty ramps up. The doppelgängers grow more convincing, new types of documents appear, and you’ll face additional mechanics like interviews, ID checks, and listening for vocal discrepancies. One wrong judgment could let a doppelgänger into the building—or reject a real tenant, damaging your credibility.

What sets this apart from other observation-based games is its slow-building tension. The game doesn't rely on jump scares but instead leans into unease and second-guessing. It's you versus the uncanny, and every wrong decision chips away at your trust in your senses.

Art, Sound, and Atmosphere

Nacho Sama’s visual style plays a huge role in the game’s effectiveness. The stark pixel art, muted color palette, and period-appropriate design evoke an old cartoon or lost training video. Characters have uncanny expressions and subtle animation differences that feel deliberately off—amplifying the horror without blood or gore.

The soundtrack is sparse, with eerie loops and environmental sounds that emphasize isolation. Occasional audio stings reinforce major moments, like letting the wrong person in. Sound design is minimal but highly effective, building dread with each knock at the door.

Community and Modding

The game's simplicity has led to a thriving community of players sharing theories, speedruns, and custom challenges. Linux players are able to fully join in these discussions, contributing bug reports, translation patches, and even mod support through tools like Steam Workshop.

There are also accessibility mods that adjust UI colors or tweak font visibility—many of which work seamlessly in Linux environments. With the fanbase steadily growing, That's Not My Neighbor promises continued updates and community-driven content.

Final Thoughts

That’s Not My Neighbor stands out in the indie horror space with its focused design, suspenseful gameplay, and truly original premise. With its new Linux support, the experience is now accessible to even more players who want to test their observation skills and nerves.

Whether you're a fan of games like Papers, Please or simply enjoy paranoia-laced horror, this title is a must-play. It's smart, stylish, and now fully playable on your favorite open-source system.

Download That's Not My Neighbor on Linux today and see if you can spot the truth behind the eyes at your door.