GameStore is a Qt based application that brings together a series of games that can be installed or uninstalled with a single click click on SUSE distributions.
Its interface is very simple. Basically there is a large window with the games icons and a column to the right with an image of the game, the official website, a brief description and the buttons to install / and Launch (run).
The application lets you control the games available and searchable through the same filter (by name, gender, installed or not installed).
It also has an online version with which you can use to install the games via One Click Install.
Looking for an Ubuntu alternative? Try DJL, a Linux Game Repository with a GUI.