Update!

Universal Split Screen has been superseded by Proto Input, which is part of Nucleus Co-Op.

Getting Started

Quick Start Important notes Virtual super resolution Goldberg Emulator Untested Games Setup x360ce Guide

Borderlands 2 Borderlands 3 Counter Strike Global Offensive Don't Starve Together Endless Space Factorio Garry's Mod Half-life Left 4 Dead 2 Minecraft Nuclear Throne Prison Architect Starbound Stardew Valley Sven Co-op Team Fortress 2 Terraria

Starbound

Starbound does not support controllers, so you will need multiple keyboards and mice.

Video tutorial

Starbound setup

Open the Starbound directory by right-clicking Starbound in Steam -> Properties -> Local files -> Browse game files…
Go to Starbound\win64 (or Starbound\win32 if you have a 32bit computer). Launch starbound.exe as many times you need. Resize the windows however you like.
Start a world on one instance. Make sure IP joinable is enabled in the pause menu options. On the others, go to Join game -> Choose a (different) character -> Set 127.0.0.1 as the server address and leave the port, account and password boxes empty.

Tips before you start

If you have inconsistent mouse movement, especially when moving multiple mice, make sure the polling rates on your mice are set as low as possible. You can usually set this in your mouse configuration program (look on the manufacturer’s website).
Disable steam overlay by right-clicking Starbound in Steam -> Properties and un-check ‘Enable the Steam Overlay while in-game’

Split screen setup

Install and run Universal Split Screen: see the quick start guide
In options, load the Starbound preset.
Go back to the Current window tab. Alt+tab into the first instance. Set the mouse and keyboard. Repeat for the other instances.
Click Start split screen. You should now be able to play. Press End to stop.

Default options

For reference, here are the default options. Starbound options