On GCN1.0 chip (Trinidad - Radeon R7 370) there is a hang at GRID logo at the
start of the game. The issue, however, doesn't appear at GCN >= 1.1 chips - the
game runs out-of-the-box there. The problem is connected with this bug:
https://bugs.freedesktop.org/show_bug.cgi?id=93352
as the fix ("LANG=C
LD_PRELOAD="../lib/x86_64/libtcmalloc_minimal.so:${LD_PRELOAD}" %command%" in
run params in Steam) from there makes the game work normally. I'd bet that it
is RadeonSI-specific, as there were similar reports from other GCN1.0-chips
owners.