I was having the same issue as dbalcar. Retroarch would crash as soon as trying to load the core then start the core. I tried using Retroarch 1.7.3 stable and nightly. I found a post on the Libretro forum addressing this issue. The work around, which worked for me, is to create a dummy file and name it cannonball.game. Put this file in the retroarch\system\cannonball directory along with your unzipped outrun.zip files . Now open Retroarch, load the cannonball core, the choose load content. Now choose the cannonball.game file as your rom file. The game starts right up as expected. You can import the cannonball.game file into launchbox using the cannonball core. I hope this helps.