A tiny system-tray utility that lets you alt-tab out of No Man's Sky without the game pausing.
Unlike injection-based tools, AltTabSky never touches NMS.exe. It watches for foreground changes system-wide and, whenever another window takes focus, sends a burst of "you're still active" messages (WM_ACTIVATEAPP, WM_ACTIVATE, WM_SETFOCUS) to the game window.
Because it only looks for a process named NMS, it works on every version of the game.
- Run
AltTabSky.exe(it lives in the system tray, no window). - Launch No Man's Sky in Borderless or Windowed mode.
- Alt-tab freely; the game keeps running.
Right-click the tray icon for:
- Active - toggle the anti-pause on/off
- Run at Windows startup - launch AltTabSky with Windows
- Quit
- Use Borderless/Windowed. Exclusive fullscreen is minimized by the GPU driver on alt-tab, which no message spoofing can prevent.
Open AltTabSky.sln in Visual Studio 2019 (or newer) and build, or from a
Developer Command Prompt:
msbuild AltTabSky.sln /p:Configuration=Release
Targets .NET Framework 4.7.2. No dependencies.