Namely, Metro Last Light. It also does not work with Darksiders. RTSS has always worked with every game I've played in the past. It was working with Metro Last Light before the update. I tried with stealth on/off, custom on/off, low, medium and high. Ssync on ssync off. Frame limiter on frame limited off. It just doesn't work with some games anymore. No ssync, no OSD, no frame limiting. Nothing works with these games. Why is this happening? How can I fix it? Ssync is a must for me because I can not tolerate vsync's input lag. PS : I'm on Windows 10 with the latest Nvidia updates. My CPU is i5 6402p (equivalent to 6400) and GPU is GTX 960.