Split-screen on PC

Junk Jack

Up to 4 players on one PC, with controllers or keyboard and mouse.

4Verified handler

Handler “JunkJack” by Talos91, version 1

What works

With Nucleus Co-op, up to 4 players can play Junk Jack together on one PC, each in their own part of the screen, with controllers or keyboard and mouse. The free community handler “JunkJack” by Talos91 does the setup and was checked by hub moderators: version 1, updated 29 Dec 2022. Junk Jack is a platformer, simulation and adventure game from 2013.

Players4
ControllersSupported
Keyboard and mouseSupported
Several keyboards and miceNot supported
Hub moderatorsVerified

How to play Junk Jack split screen on PC

Get Nucleus Co-op
Download Nucleus Co-op, free for Windows 10 and 11, and unzip it into its own folder, for example C:\NucleusCo-op. There is no installer.
Keep it out of Program Files, your user folder and OneDrive.
Download Nucleus Co-op
Install the Junk Jack handler
In Nucleus Co-op, search the Hub for Junk Jack and install its handler, or download the handler file from this page and drop it on the Nucleus window. Then show Nucleus where Junk Jack is installed.
Download the handler file (.nc)
Take a seat
Each player presses a button on their own controller to join and takes a spot on the screen. Pick a layout that fits your players.
Launch and connect
Press Launch: Nucleus opens one copy of Junk Jack per player and lays the windows out on your screen. Then link them in game, usually one player hosts a LAN or online session and the others join it. The handler notes say how.

What you need

A Windows 10 or 11 PC
Nucleus Co-op runs on Windows only. System requirements
Junk Jack for Windows
Installed on that PC. Nucleus starts every player's window from that one install.
Nucleus Co-op, free
With .NET Framework 4.7.2 or later and the Visual C++ 2015–2022 runtimes (x86 and x64). Download
Something to play with
One controller per player; one player can use the keyboard and mouse. Controllers
A PC that can run 4 copies
Each player runs their own copy of Junk Jack, so the PC carries several times the usual load. Lower the graphics settings if it struggles. Performance tips
A multiplayer mode
Nucleus links the windows through the game's own LAN or online mode; the handler takes care of it.

Handler notes

Split-screen setup guide.
Select a different character per instance, use your main mouse cursor to click on the character in the bubble and change it. Steam achievements are unlockable.
Host a direct connection multiplayer game in one instance and join in the others, in the IP field write localhost to join, click on an instance to use the keyboard.
If you launch a keyboard/mouse instance make sure it launches after a gamepad instance for it to work correctly. Disable Steam Input for this game in Steam for the gamepads to work correctly.
Read the FAQ if you have any further questions and want to know more about Nucleus Co-op.
Handler by Talos91. Please support the Nucleus Co-op team if you like my Nucleus handler work.

About Junk Jack

Junk Jack is a 2D sandbox where you can explore, build and survive in randomly generated procedural worlds full of monsters, hidden treasures and beautiful landscapes.

Summary from IGDB