Nightmare 317 Custom RSPS guide & new player hub
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Download & Install

Get the Nightmare Launcher running on Windows in under five minutes.

Install steps (Windows)

  1. Download the installer: Download Nightmare Installer
  2. Run the installer executable and follow the on-screen prompts.
  3. Open Nightmare from your desktop shortcut and let it finish updating automatically.

Setup downloads

Everything you need is bundled right into the Windows installer.

Download Windows Installer

No Java Required

The Windows installer includes an embedded runtime, so you do not need to install Java or Jarfix separately.

Install steps (Mac / Linux)

  1. Download the launcher: Nightmare Universal Launcher
  2. Ensure you have Java 8 installed on your system before opening the launcher.
  3. Open the launcher .jar file and let Nightmare finish updating automatically.

Setup downloads

A Java Runtime Environment (JRE) is required to run the launcher on Mac and Linux.

Download Launcher (.jar) Java 8 (JRE) Java 11 Windows (JRE) Jarfix

If the launcher does not start

Ensure your system's security settings allow running downloaded Java applications, and verify that Java 11 is set as your default runtime.