Hello there. Well i have this issue . While i am at ouside area in the mission the Tears of St. Lucia , everything is okey and normal at ultra settings. At the time i step in the cathedral through the sewers steadily the game loses frames at the point its not playable anymore (i litterally see frames). I tried at various settings, even to the point i set everything to ultra low (remove ambient occlusion , low textures, 1x anisotropic etc) and at 800X600 resolution. Still nothing. Game is in 2.1. My specs are : Windows 7 Ultimate 64bit , Intel Core Quad Q6600 2.4 , 4GB Ram , Nvidia GeForce 8800 GT, HDD WD 350 GB 5400 RPM Yea the system isn't top notch but it manages many more games at higher settings. At this point i have to note that every time i load a quicksave it runs very well for 1 - 2 minutes, before starts losing frames. And only inside the Cathedral. Any chance that something causes memory leaks or a broken dll stacks something?