How to Download Open Close Door

1. Click on the Open Close Door download button below.
2. Choose "Install" to install the game on the windows steam client.
3. Follow the on-screen prompts
4. Let it download the Full Version.
5. Once a game is downloaded, use the Windows Steam Client to play the game.

=== Download Game ====

Download for pc →

This guide describes how to use Steam Proton to play and run Windows games on your Linux computer. Some games may not work or may break because Steam Proton is still at a very early stage.

1. Activating Steam Proton for Linux:
Proton is integrated into the Steam Client with "Steam Play." To activate proton, go into your steam client and click on Steam in the upper right corner. Then click on settings to open a new window. From here, click on the Steam Play button at the bottom of the panel. Click "Enable Steam Play for Supported Titles."

Alternatively: Go to Steam > Settings > Steam Play and turn on the "Enable Steam Play for Supported Titles" option.

Valve has tested and fixed some Steam titles and you will now be able to play most of them. However, if you want to go further and play titles that even Valve hasn't tested, toggle the "Enable Steam Play for all titles" option.

2. Choose a version
You should use the Steam Proton version recommended by Steam: 3.7-8. This is the most stable version of Steam Proton at the moment.

3. Restart your Steam
After you have successfully activated Steam Proton, click "OK" and Steam will ask you to restart it for the changes to take effect. Restart it. Your computer will now play all of steam's whitelisted games seamlessly.

4. Launch Stardew Valley on Linux:
Before you can use Steam Proton, you must first download the Stardew Valley Windows game from Steam. When you download Stardew Valley for the first time, you will notice that the download size is slightly larger than the size of the game.
This happens because Steam will download your chosen Steam Proton version with this game as well. After the download is complete, simply click the "Play" button.

Windows Pc Requirements

Minimum:

• OS: Windows 10
  
• Processor: AMD FX 6350 / Intel i3 4150
  
• Graphics: NVIDIA GeForce GT 740
  
• Storage: 200 MB available space

Recommended:

• OS: Windows 10
  
• Processor: AMD Ryzen 5 3600 / Intel i5-9600
  
• Graphics: NVIDIA GeForce GTX 1070
  
• Storage: 200 MB available space

Linux Requirements

No minimum requirements!!
No maximum requirements!!

Mac Requirements

No minimum requirements!!
No maximum requirements!!

Retro FPS in the style of a Boomer Shooter! Step into the role of an agent and enter a lab filled with mutants, traps, and mad experiments of Dr. Hemlock. Uncover the dark truth, fight for survival, and discover what hides behind the locked doors. Will you survive?

Open Close Door is a story-driven retro FPS in pixel art style that takes you back to the golden age of 90s shooters — but with its own narrative, dark atmosphere, and relentless pace.

You play as a secret agent who receives an urgent call from Doctor Hemlock.
From the depths of an abandoned laboratory comes a chilling message: your wife might still be alive.
But the truth is darker than you can imagine.

Descend into a complex filled with mutants, inhuman experiments, and deadly traps.
Fight your way through 10 unique levels, each featuring comic-style cutscenes, interactions, and shocking revelations.

The game combines fast-paced action with story moments — shoot, explore, and survive to uncover what’s hidden behind the locked doors.

🧩 Features

• Fast and brutal retro FPS action

• Atmospheric story with a dark mystery

• Mutants, traps, and twisted experiments

• Stylized comic-book cutscenes

• A mix of action, exploration, and survival

🎮 About the Game

• Genre & Style: Boomer Shooter, retro FPS, 90s-inspired pixel art action

• Story: Play as an agent uncovering the truth — your wife may still be alive, but the lab hides something much worse

• Gameplay: Unique levels, comic-style cutscenes, varied weapons, fast pacing, and survival mechanics

• What makes it special: A moody atmosphere, a blend of story and action, and interactions with the environment and characters

💬 Developer’s Note

Open Close Door is an indie project I’m creating alone in my free time — purely out of love for classic retro FPS games.
Don’t expect a massive AAA production, but if you appreciate the authentic atmosphere of 90s shooters and handcrafted content, I believe this game will grab you.
Every wishlist and bit of support means a lot to me. 🙏

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