Read Our Open Letter to the Leadership Team of Daybreak Game Company.
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Infantry Online

Welcome to the world's first and only massive multiplayer online isometric shooter.

About Infantry Online

Infantry Online pits you against hundreds of players in real-time, fast paced tactical combat. Use momentum to your advantage and to your enemies detriment as your bullets and explosive shrapnel ricochet using Infantry's Newtonian physics model. Plan your attack from the shadows and ambush your enemy thanks to Infantry's real-time Fog of War visibility model.

With a vast collection of player-made game arenas, enter the bloodbath in Skirmish and Frontlines Zones, the dynamic and base defense-oriented Capture The Flag Zone, and dominate the space in Fleet Zone. Survive with your team against the neverending tide of computer-controlled AI in Zombie Zone, or play against the swarm of player aliens in Bug Hunt. The choice is yours.

Read Our Open Letter to the Leadership Team of Daybreak Game Company.

What's New

Open Letter July 2020

We have put together this open letter to Daybreak Game Company in hopes of being fully authorized to maintain and update the game for the foreseeable future.

Eol: Pioneer Station Launches June 2020

Brought to you by our zone developer Mode, this new zone combines classic Eol mechanics and gameplay with Free Infantry's AI bot capabilities in a Battle Royale format.

Infilitrate enemy AI bases and battle roaming scavengers as the playable map area shrinks around you and zeroes in on a blood bath between you, other players, and hordes of tactical bots.

Please note that the zone is under active development. You may encounter glitches and bugs that we are in the process of fixing.

Recent CTF Updates May 2020

The following list of changes were conducted by our zone developer Axidus.

Staff can swap game modes between mini Twin Peaks, full Twin Peaks, and CTF:X Brown. Eventually will include SUT and the rest of CTF:X.

Twin Peaks (Mini)

  • Each team starts with 400 HP turrets defending their base.
  • Dynamic portal system allows for fast warping to enemy/home.


  • Brown base and outside portions surrounding brown base are playable.
  • Dynamic portal system allows for fast warping to enemy/home.
  • Private teams enabled (current team size: 7).


  • Graphics imported (Vision/Physics still in progress). Will finish this if there is a demand.

Surface & Space Combat

Every zone in Infantry Online is player-made, using the development tools available to you.

Io's Landing

Io's Landing

Side-scrolling shooting mania, Infantry style!

Fight through a gauntlet of AI soldiers and mechs as you dash through buildings and corridors, holding and capturing positions along the way.

Io's Landing utilizes a smart portal system that always drops you near the front line of battle, and the difficulty of the zone is scaled with the number of players.

This cooperative RPG zone is full of specialty classes, shop items, upgrades and plenty of warzone looting.

Io's Landing offers solo and cooperative multiplayer gameplay.

Twin Peaks

Modern Twin Peaks

Experience a cornerstone of Infantry-based gameplay in this highly tactical, base-defense driven zone.

The war between the Titan Militia and Collective Military wages on in this classic Infantry zone revamped on a compact map that includes enemy warps to keep the gameplay constant.

Offering a competitive armory of weapons, items, and the ability to build defensive and offensive structures, CTF is one of the oldest and highly rated running zones in Infantry.

CTF is recommended for players who are seeking the thrill of the toughest combat scenarios in Infantry Online.

Bug Hunt: Extermination

Bug Hunt: Extermination

Put down the Raid can and pick up your raid gear because we've got bugs...big bugs.

Embark on the rescue mission to research facility, Saturnalia and save the six scientists from an experiment gone awry.

Bug Hunt: Extermination has you playing cooperatively, as the humans, against the AI-powered alien invaders -- the bugs!

Fleet StationPass SOE


Two space colonies battle for territory in one of Infantry Online's biggest zones. Board massive, multi-player ships and engage in an all-out territory war in Fleet.

Harvest and steal enemy supplies, build defense structures and frigates, and assail the enemy mothership, Fleet offers one of the most dynamic space game scenarios to date.

...and many other zones.

Leagues & Competitive Gameplay

Free Infantry is proud to host the Unified Skirmish League and the CTF Public League.

League matches are held during weekends. We recommend new players to spectate league matches to get a better understanding of the high-level gameplay that Infantry Online offers.

For more information, to participate as well as to see videos of previous games, visit the Infantry Online League Website.

Community Supported & Player-Driven Development

Since 2003, Free Infantry has been the benevolent custodian of Infantry Online that sought to allow players to create and host zones that they want to play. A number of features within the game – pioneered by our small community – have found their way into the official servers. With Sony Online Entertainment shutting the servers down, Free Infantry has brought the community back together in full. Today, we finance, maintain and grow Infantry Online into a bigger and better game.

To this end, Free Infantry has open-sourced the entire server infrastructure required to host the zones, and provides all the tooling that you require to build your own zones.

Staff Members

Feel free to reach the staff members through our Discord server.

Project Coordinators & Core Developers

Mizzouse (Brian)

Administrators & Community Managers

Abbath (Zach)
Ace (Michael)
Champ (Chris)
Col. Kitty Hawk <WML> (Brendon)
mbx (Matthew)

Zone Developers

Axidus (Travis)
BurntDevil (Nick)
Mode (James)

In-Game Moderators

dp (Chris)
Kev (Kevin)
zmn (Jonathan)

Frequently Asked Questions

I can't connect to the server / can't register an account (server error)

Make sure that you have port 1010 open on both your Windows Firewall as well as your router/modem.

Ensure that your settings.ini and default.ini have the following configurations:


Note that you may need use Run As Administrator with Notepad for the changes to take effect.

I forgot my username / password

You can use the Launcher's Forgot Password functionality. Alternatively, you can speak to one of our admins in the Discord Channel for account-related inquiries.

Map editor crashes / won't render properly

Run Windows XP inside of a VM. We highly recommend you use Microsoft Virtual PC along with Windows XP Mode. Other virtualization software (VMWare, Virtual Box) work as well.

Otherwise, we recommend that all tools be run in Compatibility Mode with 16-bit Color Mode checked. Experiment with settings until you find a combination that works for your system.

How can I play on macOS?

We recommend installing Windows via the Boot Camp software that’s pre-installed with the majority of Mac’s. This is the easiest method and has been tested by many of our players.

Boot Camp simply let's you switch between macOS and Windows without effecting the current OS install.

Please follow the instructions here:

Other options exist such as Geforce NOW and Parallels but have not been fully tested.

© 2003-2020
"Infantry ™", "Infantry Online ™" trademarks are property of Daybreak Game Company LLC.
Free Infantry is not affiliated with Daybreak Game Company LLC.

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