by GreenPepper on Wed Aug 31, 2016 6:59 pm
This issue has been confirmed to be prevalent across several Source mods. Valve has been contacted about the issue, but is yet to respond with a solution. A work around for launch options has been found in which you must use the a custom shortcut for the mod outside of Steam and put your launch options there. Furthermore, this issue has only come up recently (within the past month or so). Please post any updates for this problem if you have any in this thread.