$ sudo apt-get update
$ sudo apt-get install extremetuxracer-data 

extremetuxracer-data is installed in your system.

Make ensure the extremetuxracer-data package were installed using the commands given below,

$ sudo dpkg-query -l | grep extremetuxracer-data *

You will get with extremetuxracer-data package name, version, architecture and description in a table

extremetuxracer-data package basic information: