Bad lag and stuttering in Source Unpack?


When I play the steam release of the game, it runs smooth with no stuttering.

But with the source Unpack, at the same settings, I get stuttering every time I look around, making some chambers much harder than on steam.


AMD FX 4300
Nvidia GTX 750 Ti
8GB Ram

Any ideas?


Please post your questions into the helpdesk thread in the future.


Try removing “-window -borderless” from the Portal launcher.