Gnome Video Arcade is a simple Mame frontend designed to work well under Gnome. It is generally a very simple way to get your roms running in your system without much fuss, but what is Mame and what are the roms you will have to use?

MAME and ROM images

The Multiple Arcade Machine Emulator first released in 1997 is a cross-platform emulator designed to recreate the old hardware that arcade game systems used, in the modern computers of today. MAME can currently successfully run thousands of ROM images originally found in many different arcade machines from 1970 till now.

A ROM image is basically the data that the mainboard of an arcade machine contained and usually it was a specific game (or more than one in some cases).

rest here

Also: Steam has greenlit more games for Linux!