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Lockdown Protocol is a score-oriented platformer/shooter game with multiplayer support and built-in level editor. The game is available for Windows and Linux PCs.

You are a lone scientist in a research facility on automatic lockdown. For no apparent reason everybody and everything is trying to kill you. Fight your way out, collect bigger weapons on the way and blast your enemies into pieces! Compete for high-scores in single player levels or challenge your friends to a multiplayer deathmatch!

Download free playable version Purchase full version

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Note: This game is still a work in progress. Currently all major features have been implemented and the development focus is on fixing any remaining bugs and polishing. The final version should be out in March 2015.



Single player gameplay in public beta version 0.21.0:

Local split-screen multiplayer match in public alpha version 0.20.0:

And another video demonstrating built-in level editor in public alpha version 0.18.0:

The level created in this video (tutorial1) is available for download using the in-game level browser.

Development status

What's done

Following features are available in the latest beta version:

  • Single player game.
  • Local split-screen multiplayer matches.
  • Network multiplayer matches.
  • Level editor.
  • 25 single player levels (8 available in demo, rest can be previewed).
  • 7 multiplayer levels (one available in demo, rest can be previewed).
  • 11 different weapons.
  • 7 different enemy types (+ enemy items).

What's coming

All major features have been implemented and development focus is on polishing and bug fixing from now on.

Known issues

Missing textures on Windows with integrated Intel GPUs (at least HD4000) and OpenGL renderer. The workaround is to make sure you have DirectX 9 run-time installed.

Gamepad support on Windows does not work as reliably as it should. Gamepads are not always detected by the game properly, even when Windows detects the device. Sometimes gamepad needs to be manually set as "preferred device" (in Windows game controller settings) to make it work. Sometimes disconnecting and reconnecting USB gamepads magically resolves the problem.


The latest version is 0.23.0 released on 2015-03-01:

Public beta version 0.23.0 for Windows

Public beta version 0.23.0 for 64-bit Linux

Public beta version 0.23.0 for 32-bit Linux

The free version lets you play the first eight single player levels and one multiplayer level, rest of the levels can be previewed within time limitation. Level editor is fully enabled. It can be upgraded to full unlimited version.

Lockdown Protocol is also available on Desura (updates might not be available immediately on release due to the approval process):

Lockdown Protocol on Desura

Frequently asked questions

How do I install the game?

Just download the right version for your operating system, extract package contents to a folder of your choice and run the game from there. You can run provided or install.vbs script to create shortcuts in the system menu.

You can also install the game through Desura client.

In Windows you must have Microsoft Visual C++ 2010 runtime installed.

Linux packages are known to work in latest stable releases of Ubuntu, Debian, OpenSUSE and Fedora distributions, but the game should work in many other distributions too. In some Linux distributions (for example Fedora) you may need to install libXaw, libGLU and libpng12 -packages from package manager.

What are the system requirements?

Here's my best guess on minimum hardware requirements:

  • 1.6Ghz processor
  • 1GB RAM
  • DirectX 9.0c or OpenGL 2.1 compatible 3D graphics card with at least 128MB of memory. Intel's HD3000 and later integrated GPUs work too.
  • 100Mb of disk space available.

How can I share a level that I created?

The easiest way is to use the built-in level sharing mechanism. From Manage levels menu you can upload your levels online and browse levels uploaded by others. When uploading a level you can give a password, which allows you to update the shared level later on.

The levels can be copied manually too. All user created levels are stored in levels -subfolder inside the game data folder. If you want to give a level named foobar to your friend, you need to send him/her foobar.xml file from the levels -folder. Any new level files copied to levels -folder will automatically show up in the game next time the game is run.

The location of user data folder depends on the operating system, it is typically one of these (Linux, Windows XP and Windows Vista/7/8 respectively): /home/<username>/.lockdownprotocol C:\Documents and Settings\<username>\Application Data\lockdownprotocol C:\Users\<username>\AppData\Roaming\lockdownprotocol

If the level to be shared is a multiplayer level, there is one more option. If you host a multiplayer match with that level and your friend joins the match, the level will be automatically transferred.

Why are there no online multiplayer matches?

First of all, there are no central/dedicated game servers. Any player can host a game and it will appear in the match list so that other players can join the match. Note that you must enter an online name for the match, otherwise it is assumed to be a local match and is not listed online. Unfortunately the user base is currently so small that there are rarely any matches to join.

The solution is to host your own match and ask your friends to join.

Why can't other players join my hosted network multiplayer match?

If the match is visible to others, but connecting to it timeouts, the most common reason is network address translation (NAT) done by your router/modem. If the computer acting as server is behind a NAT (not directly connected to internet), the router might be blocking access to server. There are four standard types of NAT and the game should be able to deal with three of those by using so called NAT punch-through.

If your router happens to implement the fourth type, symmetric NAT, then only option is to change your router settings. Router's port forwarding must be configured so that the UDP port used for server (26001 by default) is accessible from the internet.

If you are trying to set up a match with your friends, you can always try hosting the game on someone else's computer.

Why is this not on Steam?

One does not simply walk into Steam. Currently the fanbase is way too small to have a realistic chance to get through Steam Greenlight. When or if the game gains enough public interest, I will submit it to Greenlight.

If the game is some day available on Steam, people who have already purchased it will receive Steam keys.

Will there be a version for OSX?

Most of the game code is platform independent and all dependencies are available for OSX too so it could be done, but currently I haven't got the hardware or enough time to set up and maintain yet another platform version.

Fortunately the Windows version has been reported to work well on OSX using Wine. You will also need Microsoft Visual C++ 2010 installed. I recommend that you run the game with '--opengl' command line option to use OpenGL instead of Wine Direct3D emulation.