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3 min readUpdated Oct 28, 2026

How To Upload Halo 3 Files To Your Project Reclaimer Server

Your Project Reclaimer server runs on Halo 3's own files, copied from your own Steam copy of Halo: The Master Chief Collection. Project Reclaimer doesn't include them and its terms don't allow anyone to share them, so we can't install them for you. You upload them once, and the server starts by itself as soon as they're in place. After a Halo 3 update on Steam, you upload the new engine file again, see After a Halo 3 Update.

Until then, the Console page says which files are missing and checks again every 15 seconds.

Which Files You Need

All of them are in the halo3 folder of your Master Chief Collection install. To open it, right-click Halo: The Master Chief Collection in your Steam library and choose Manage > Browse local files.

FileWhat it's for
halo3/halo3.dllAlways needed
halo3/maps/shared.mapAlways needed
halo3/maps/campaign.map and halo3/maps/040_voi.mapRecommended: Forge maps with campaign vehicles or AI need them
halo3/maps/info/ (the whole folder)Map names and details, about 1 MB
The .map file of every map you hostFor example halo3/maps/riverworld.map for Valhalla

Halo 3's map files are named differently from the maps:

MapFileMapFile
Guardianguardian.mapValhallariverworld.map
The Pitcyberdyne.mapLast Resortzanzibar.map
High Grounddeadlock.mapNarrowschill.map
Sandtrapshrine.mapSnowboundsnowbound.map
Constructconstruct.mapIsolationisolation.map
Epitaphsalvation.mapFoundrywarehouse.map
Rat's Nestarmory.mapStandoffbunkerworld.map
Cold Storagechillout.mapAvalanchesidewinder.map
Blackoutlockout.mapGhost Townghosttown.map
Assemblydescent.mapOrbitalspacecamp.map
Sandboxsandbox.mapCitadelfortress.map
Hereticmidship.mapLongshoredocks.map

For campaign co-op, add each mission's map file too, such as 010_jungle.map for Sierra 117.

Uploading the Files

  1. On your PC, make a folder named halo3 with a maps folder inside it, and copy the files above into it, keeping the same folders (halo3.dll in halo3, the .map files and the info folder in maps).
  2. Log in to Bropanel and Stop your server.
  3. Connect to your server with SFTP and open the game folder.
  4. Upload your halo3 folder into game, so you end up with game/halo3/halo3.dll and game/halo3/maps/.
  5. Start your server.

After a Halo 3 Update

When Halo: The Master Chief Collection updates on Steam, Project Reclaimer brings out a release for the new game version, and your server installs it with Automatic Updates. Then upload the new engine file:

  1. Update the game in Steam on your PC.
  2. Log in to Bropanel and Stop your server.
  3. Connect with SFTP and upload halo3.dll from your game's halo3 folder into game/halo3/, replacing the old one.
  4. Start your server.

Until then, the Console page names the file that doesn't match.