Depending on the local language/locale code settings of your Linux-computer, it is likely that GRID Autosport doesn’t fully load. When you launch it, the pre-game options-panel displays, and after closing it, the GRID Autosport Logo is displayed, but the game loads forever. There is a very easy fix for this problem: Set the launch-options for GRID Autosport in your Steam-Client to LANG=C %command% and GRID Autosport will work fine! Source: Steam Forum