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Proto:Just Cause 3

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This page details one or more prototype versions of Just Cause 3.

Late 2014 prototype

Leaked via Xbox-underground in late 2014, these are currently the earliest details of Just Cause 3.

Game monetization

According to the article by Gamespot, somewhat prior to this version of the game, the PC version was meant to be free to play and the console version payed and supported by micro-transactions, but these plans were already changed at this point, as we can see in the final game and later stated by Christopher Sundberg.


June 24th 2015 prototype

To do:
  • Test areas
  • Huge differences.

An early build of Just Cause 3 was leaked in early 2020. Compiled on June 24, 2015, it features a ton of dev and debug tools, 24 test areas in the form of additional islands, a few differences in terrain, smaller differences here and there, and clues to even earlier versions of the game.

Dev Menu

Can be accessed from the pause screen by pressing E, and lets you do quite a lot of things like spawn vehicles and weapons, teleport to bookmarked locations and more. Pressing R once it's up already will bring up a second, smaller page.

It can be force enabled in the final game via the pause menu file. It shows up mostly like it would in the beta. Some of these features sadly don't work anymore though.

The dev menu once enabled in the final game.
  • The freefly option to enable the free camera does not work, since it was removed from the game completely.
  • The godmode options does not work either.
  • Most cheats still work.
  • The graphics and camera settings do not work.
  • Most of the AI options still work.
  • The cutscenes option still works, which lets you play any cutscene.
  • Teleports to bookmarks of towns, bases and outposts and other locations do not work anymore.
  • The mission menu still works, which lets you replay any mission.
  • The teleports to challenges do not work anymore.

For a detailed showcase of the dev menu, see here. To get the dev menu in the final game, use this mod.

Debug Menu

The debug menu is a much larger menu and can be opened by pressing F9. The initial page shows:

  • Toggleable god and jesus mode.
  • Toggle freefly camera and paused freefly camera (paused camera freezes the gameworld).
  • Bookmarks to let you quickly teleport to various locations.
  • Debug Log to change settings about error messages on-screen.
  • Dev, which is the largest menu and lets you do so many things they can't possibly be listed here. A video showing the weapon options in the dev submenu can be found here.
  • Settings, where you can quickly change some graphic options.
  • Show, which just lets you toggle warnings about game objects.
  • Spawn, a large selection of vehicles and NPCs to spawn.
  • Update speed and normal update speed to reset it to 1.
  • Show Region 1 border (1st release), which doesn't seem to do anything.

Debug Console

The debug console once opened.

Pressing the tilde key, you can open the beta's debug console. It presents you with the version number, here 1.0, and three tips on how to use it:

  • Use: execute <buttfile> to execute a buttfile.
  • Use: list <search string> to list available commands.
  • Use: help <command> to show command options.

The first option tells you how to execute a buttfile. A buttfile can be compared to a batch file under Windows. You can create one by creating a txt file in the install location of the game and changing the file extension from .txt to .butt. As for commands you can use, you can use the same commands as you'd use for the debug console. As an example, the console has the command add_menu_event <eventname>, which lets you add a game event to the debug menu. The events you add will show up under a new "Events" tab. So say you want to add the player kill event from the console, you'd enter "add_menu_event ply.kill". It is now available to quickly trigger from f9 > events. But say you want to add a bunch of events. You could then create a buttfile and enter commands to add several events. Then simply execute the buttfile using "execute events.butt" as an example and you got all your events ready with just one command.

The list command is much simpler. You simply enter "list event" as an example and the console will list you all events containing that word. When you search for event, it will list you add_menu_event and send_event as an example.

The help command is used just like the list command, entering "help send_event" as example gives us its usage, which would be "send_event <event name>". So the command allows us to call any game events.

Cancelled Multiplayer

Just Cause 3 was meant to have a built in multiplayer mode, but like the microtransactions, it was cancelled. Apart from some leftover multiplayer code that was used by nanos as reference for the Just Cause 3 Multiplayer mod, nothing really is left in the final game. The debug menu however shows a multiplayer option in the dev submenu.

Opening the multiplayer submenu, you can see the options:

  • Debug, which has a submenu.
  • Detect servers.
  • Host.

Pressing the latter two does nothing visible. The debug submenu has the options:

  • Debug draw NetworkComponent, which shows a blue marker at the spawn points of vehicles and an ID for each of them.
  • Record Componnt traffc, which shows a red/black flashing "Recording Data Traffic" text at the top of the screen.
  • Show Component Traffic, which shows a small sheet that lists name, avg bits/packet and bps.
  • Show NETLOG_INFO and NETLOG_WARNING, which both do nothing visible.
  • Show Network Debug Info opens a big text overlay that can be seen in the image to the right.
  • Shutdown network.

It has been tested by two persons on the same virtual network, but none of the options here can be used to communicate to another game on the same network.

Cut Content Still in the Beta

Cut Character

Going into the debug menu's "spawn" section, you get presented with a bunch of categories, one of them is "main_characters". Going here, we can see an additional character, called Salvatore, mc_salvatore in the menu. He looks just like one of the concepts for one of the mafia faction's members, which was also cut. One concept image also shows him and Looch next to each other. This character is not in the files of the final game anymore, the file that has spawn names and paths to character files however still lists mc_salvatore.

Cut Chaos Object

On test island 24 on the far left there is a collection of all chaos objects. One of them is the completely unseen oil pump, similar to the ones in Just Cause 4. It has simple textures, working animations, and can be properly destroyed.

Cut Random Encounter

On test island 13 you can find a series of buttons that trigger random encounters for testing. One of them triggers "cast away (has been cut)". It is basically the opposite of grounded boat. A rebel in a boat is stuck on the water because the engine broke and you have to tow it to land. It looks to be unfinished however, as bringing the boat onto land does nothing. Instead of instructions in the top right, it just says "LOC: 1675637260).

Pre Beta Terrain

The water mod texture of the beta.

Just like for the regular game, the beta too has a texture revealing landmasses that don't exist in it anymore. For the final game we could see the terrain of this beta. The file found here shows another range of test islands, this time in the bottom left.

Just like lacrima overlaying the test areas of the beta in the final game, boom island overlays some of them, but was not in the game at this point.

Additionally, it's revealed that the top right part of the main island was a lot bigger than it is now and the small island group to the south of the main island was even bigger and the bottom of the volcano was not cut off.

In the beta, around the big cut off areas of the main land, you can still see shallow water, similar to the top right test island and the final game.

Near boom island in the beta you can actually find leftovers from an earlier test island. Making a mod that shows these even earlier test islands on the map, we can also see which one it was. Teleporting to "Test_Ground_material_sound" in Bookmarks > Test Areas brings you to a floating grid with names displayed over each area what sound it would make. Sadly it doesn't make any sounds since there's no ground there anymore.

Launch Options

Launch options for Just Cause 3 are used to load mods in the final game, to do that, you would use --vfs-fs dropzone --vfs-archive patch_win64 --vfs-archive archives_win64 --vfs-fs . with "dropzone" being the name of the folder mods are loaded from. The beta loads mods from dropzone by default, but also has a lot of other launch options:

  • -offline - Prevent the game from logging in to servers. Not that it works for the beta anyways, so it's recommended to use this to speed up the launch.
  • --autorun_buttfile= - Run commands in a buttfile on game startup.
  • -autostart
  • -quickboot - Significantly starts up launch speeds. Because of how fast it loads things, it can happen that you fall through the map at first because it's not fully loaded yet.
  • -disable_closelocations
  • -netPlayback=
  • -netRecord=
  • -noTimeOut
  • -debugSessionToken=
  • -password=
  • -playerName=
  • -serverName=
  • -fake_max_friends
  • -statdebug
  • -predevnet
  • -fake_stat_chaos
  • -onlinedebug
  • -dummy
  • -fake_streaminstall
  • -mem_fill
  • -og_malloc
  • -mem_jc2
  • -mem_tag
  • -mem_debug
  • -mem_age
  • -mem_map
  • -mem_shark
  • -mem_shark_threshold
  • --disable-assert-dialog - Disable error messages
  • --uac_admin
  • -fmod_record_commands
  • -fmod_live_link
  • -bookmark=
  • -restart_point=
  • -buttfile=
  • --protect-free-pages
  • -openautomate
  • -disableinputwhenoutoffocus
  • -allowmultipleinstances - Allow the game to be run several times at once. This causes water to be transparent.
  • -quit-on-assert
  • --disable-crash-reporter
  • -tm_file
  • -tm_record
  • -tm_pause
  • -tm_server:
  • -tm_memory
  • -create_time_stamp_file
  • -debug_resources
  • --autotest-timestamp
  • --texture_stream_maxtextures
  • --texture_stream_batchsize
  • --texture_stream_mb
  • --texture_stream_disable

The final game actually still has the --autorun_buttfile= launch option, but due to all debug console commands being removed, this option is pretty much useless.

Unseen Concept Images

In the beta's image files, you can find three previously unseen concept images.

One of them shows the old ship at the rebel cave, though it's in one piece instead of being broken apart. There's also a small port next to it.

The next one shows a giant warship, which probably became the corvette warship, though the one in the concept is many times bigger and looks to have emp cannons and trucks with trailers.

The last one might as well be Just Cause 4. It has a way bigger mountain region, a bigger base and a plane that looks super similar to Just Cause 4's Thunderhead bomber jet with folding wings.

Small Differences

Map Screen

Instead of having a transparent background like in the final game, the map screen in this build has an image as a background. The other map tabs have some design alterations as well.


While in freefall, the camera shakes like it did in Just Cause 2, which is probably just a leftover.


Vehicles in this build do have a very different offroad driving sound. It's much louder than it is in the final game. Additionally, when you drive a vehicle in water, you leave it automatically after a few seconds, similar to Just Cause 2.


Going underwater in the beta you can see it is less green and more blue. It also looks like there's less of a filter over it.

Earlier Game Footage

Every item in the rebeldrop menu has a preview video. Most videos in the beta are not final and give us a look at even earlier versions of the game! Even though these videos are pretty low resolution, they still show us a lot of information.


Rico's appearance for Just Cause 3 was altered over time as well. One of the videos shows him with a slightly different looking face.


Some preview videos show pretty different lighting to the one found in the final game. In one of them we can see lighting that looks pretty similar to Just Cause 2's. Another one shows lighting more similar to Just Cause 4.


A few videos also show earlier revisions of the game's UI. One of them show a quite different layout from even what we can see in the beta and another one showing the map screen, but the window of the map being angled to the right. Another video shows a different speedometer on both a plane and a boat.


These videos also reveal earlier versions of a few vehicles, like a pretty different looking rebel Obrero tuck. But we also get a look at the before known of Vistosa without spoiler and dust free police car actually in-game.


Weapons seem to have been finished pretty early on, at least for the most part, we can still see a few differences, like the CS Negotiator having a front grip, slightly differently coloured UVK rocket launcher and a CS Spectre Mark V with lasers.

Chaos Objects

Chaos objects didn't see any drastic changes that we know of, besides the sphere tank, which was completely white instead of silver-gray.


In one of the videos we get a view at the snowy mountains of the main island. They look to be very unfinished at this point and consist of simple shapes and plain white. Another video shows what seems to be Babica, the terrain however looks to be a desert instead of grass. There is also no desert in the final game. Another video supports that some areas, or potentially the majority of Medicí would have been in a desert is shown in the entire mainland with desert terrain in the background.

The entirety of these early videos can be found here.