ISRTV.com presents our review of GSC 2013. Game Stock Car by Reiza Studios came on to the scene in 2011 and is based on the Image Space Incorporated Physics and Graphics engine. ISI are the makers of rFactor, so it's based on that exact engine. They are Based in Londrina, Brazil and with a development staff spread all over the globe. If you've downloaded a lot of mods for rFactor, chances are you have already enjoyed some of the creations from members of Reiza Studios.