Everything that keeps working when you click the other screen
Clicking your other monitor takes focus away from the game, and most games react badly. Second Screen Gaming answers each of those reactions, set once per game.
Controller
Stays with the game while you click elsewhere Experimental
Controller assistance keeps the game believing it is still the active window and keeps passing it your controller while you browse, chat or type on the other screen. It loads a helper into the game, so it asks for your acknowledgment first and switches itself off where anti-cheat is detected.
Controller not working after alt-tab? Keep it in the gameAudio
Keeps playing when the game loses focus
For Source and Unreal games it writes the right setting into the game's own configuration. Other engines, Unity included, keep their sound through the focus assist. Send sound to that screen plays the game through the monitor it sits on.
No sound when alt-tabbed? Keep game audio on in the backgroundFocus
Keeps the game running and unpaused
The focus assist sends the game the activation messages Windows sends when you really switch back to it, on a slow interval and, if you want, the instant focus is lost. Engines that stop their loop keep going, and an optional key press closes a pause menu the game opened anyway.
Game freezes when you alt-tab? Keep it running tabbed outWindow
Borderless on the screen you choose
Strips the window frame and fits the game to the monitor you pick, recognized by the monitor itself rather than a display number. It stays fitted when the game recreates its window, and because nothing is injected, it works with anti-cheat games too.
Game opening on the wrong monitor? Fix it for goodMouse
Stays on the game's screen while you play
Keep the mouse on this screen holds the cursor on the game's monitor while the game is in front, so a fast flick cannot land on your other screen. Switch away and the mouse is free again. Games with a tighter lock of their own keep it.
Lock your mouse to one monitor while gamingPer-game fixes
Saved per game, applied at launch
Every game keeps its own set of fixes. Configuration fixes stay written in the game's files, and the tray agent re-applies runtime assists within seconds of the game starting, even when the main window is closed.
Per-game fixes that apply the moment a game startsAlso included
The details that make it livable
Clears Windows' power throttling for the game's process, so it is not slowed down in the background.
Games built on SDL2 minimize or pause the moment focus leaves them. An option on the focus assist loads a small helper into that game which stops SDL from doing either, for that game only. Switched off where anti-cheat is detected.
A small tray agent re-applies fixes as games start, without the main window open.
Every change can be undone
Files are backed up before the first edit, and turning a fix off puts back each setting it changed.
No administrator rights
Everything runs as you. Nothing is installed system-wide.