UrbanTerror features a wonderful online experience, taking place over dozens of maps resembling various urban locations. The motto of the game is "fun over realism", and UrbanTerror encompasses a fast-paced gameplay along with some pretty neat features.
A shell is a command interpreter which allows you to interact with the computer. The way things work is pretty simple: you type in commands, the shell reads them, performs the tasks it was asked to do, and finally it sends the results to the standard output, which is usually the screen.
Alien Arena is a free, open-source first-person shooter built around the CRX engine, an open-source, Quake-based engine. It features a fast-paced gameplay taking place in a Sci Fi universe over dozens of maps. Alien Arena provides both single-player and multi-player modes.
SuperTuxKart Or STK for short, is one of the most popular racing games available freely and open-source on Linux. You can find install it in any major distribution with the default package manager.
Each Linux Mint release usually offers four flavors, to say nothing about LMDE: Mint Cinnamon, Mint MATE, Mint KDE and Mint Xfce. The MATE edition is based around a desktop environment forked from GNOME 2, featuring a similar interface and a familiar user interaction experience.
Here is an overview of 10 clones of the game after which a syndrome was named, some graphical and some running in a console. Hopefully you will find these useful (maybe while still watching out for the Tetris effect).
QGifer is a Qt tool available for Linux and Windows, that can convert part of a video to an animated GIF file.
Conky Manager is a GUI that allows you to easily manage Conky configurations. The latest version - 1.1 -, lets you choose from 7 such configurations / themes.