$ sudo apt-get remove ioquake3 

Uninstall ioquake3 including dependent package

If you would like to remove ioquake3 and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove ioquake3 

Use Purging ioquake3

If you use with purge options to ioquake3 package all the configuration and dependent packages will be removed.

$ sudo apt-get purge ioquake3 

If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.

$ sudo apt-get purge --auto-remove ioquake3 

See Also,