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Recommended · Windows

MellowOsu Lazer

A verified portable Lazer package with the same MellowOsu runtime and API routing as the launcher, without installing the launcher itself.

Download Lazer
Install once · Windows

Mellowosu Launcher

Install once to your PC. The launcher creates a Start Menu shortcut, checks updates on every launch, and uses a patch matched to osu!lazer 2026.1005.0.

Download installer · 1.0.151

Lazer setup

  1. 1.

    Download the archive

    Download the verified portable package and extract the whole archive.

  2. 2.

    Keep the folder together

    Do not move individual DLLs or runtime folders out of the extracted directory.

  3. 3.

    Run MellowosuLazer.exe

    Start the included wrapper; it opens osu!lazer with the MellowOsu API configured.

Manual osu!stable connection
  1. 01

    Open shortcut properties

    Right-click your osu! shortcut and select Properties.

  2. 02

    Edit the Target field

    Place the cursor after the closing quote, add one space, then append the server argument.

  3. 03

    Apply the change

    Click Apply, then OK. Do not rename or move osu!.exe.

  4. 04

    Launch from this shortcut

    Start osu! with the edited shortcut and sign in with your MellowOsu account.

  • The argument belongs outside the quotes around the executable path.
  • Always launch the game using the edited shortcut.
  • Remove the argument to return to the official osu! server.
Read server rules