I was running the game fine in -nobenchmark before, and everything was running fine enough. Without changing any properties, I installed the Development Build for the game to play with friends who had it. The game from that point ceased to load: when I opened it, it would load up as a black screen and stop responding. So, I am unable to play the game. I tried removing -nobenchmark, putting it back on, restarting steam, validating the game cache, everything. The only thing I haven't done is uninstall and reinstall. Any help would be greatly appreciated, thanks.