Roblox is Finally on Ubuntu!
On June 11, 2021, a user by the name of
ImSlappy826(Slappy826#0001on Discord) created a one-line patch for Wine that allowed the Roblox Player to work again on a GNU/Linux or BSD system.
This patch was released in the development release of Wine 6.11. Here are the steps on installing it on Ubuntu:
- Add the repository key
 
# Add repository key
wget -nc https://dl.winehq.org/wine-builds/winehq.key
sudo apt-key add winehq.key- Add the repository. Consult this table for the command to run.
 
# Add the repository
sudo add-apt-repository 'deb https://dl.winehq.org/wine-builds/ubuntu/ focal main'- Install Grapejuice and its dependencies
 
# Update packages
sudo apt update
 
# GrapeJuice Dependencies (https://gitlab.com/brinkervii/grapejuice)
sudo apt install -y wine wine64 wine32 git python3-pip python3-setuptools python3-wheel python3-dev pkg-config libcairo2-dev libdbus-1-dev gtk-update-icon-cache desktop-file-utils xdg-utils libgirepository1.0-dev gir1.2-gtk-3.0
sudo apt install -y --install-recommends winehq-devel # Install the 6.11 development branch
 
# Installing GrapeJuice
git clone https://gitlab.com/brinkervii/grapejuice.git
cd grapejuice
python3 ./install.py- Search for Grapejuice through your applications and open it up
 - Click on 
Maintenance > Install Roblox 
And you are done!
References
Here are some references for troubleshooting:

