Ubuntu Linux

Note about this tag: games that must be compile from source or installed with a script are only considered 'Ubuntu compatible' if they come with complete and easy to follow instructions to satisfy all dependencies and simple works without the use needing to figure anything out. An unmentioned dependency, or an overly complicated process is not 'ubuntu computable' for the purposes of UVL.

Notes about Ubuntu:
Ubuntu is a Debian-based Linux distro. The word "ubuntu", a Zulu concept, roughly translated, 'everything good connecting humanity'. The Ubuntu distro emphasizes freedom, 6 month releases & easy to use.

It is touted as the best desktop Linux distro by many Linux users.

Since version 8.10 (Intrepid Ibex), Ubuntu has included a self replication application known as usb-creator. It allows the user to created a bookable CD (save documents to host), bootable USB (save documents to host). persistent installation on USB drive (save documents to self), or persistent installation on CD-RW/DVD-RW disk (save documents to self), intended for for use on another computer.

Variants:
All variants have access to the same repositories (applications). Thus no variant is stuck in its original installed state. Any variant may install apps meant for a different one. However, some variants have non-free repositories deactivated by default for the user's benefit, and will warn the user before activating them.
Once any version is installed using the default applications, the other version's applications can also be installed and one version can even be entirely converted to match another.