In addition to the black textures and artifacts listed in someone else' thread, it is also very poor at supporting multiple displays. When going into fullscreen mode, Serious Sam fullscreens on my left monitor but it appears to be trying to span across both monitors. All content is stretched and the center point appears to be in between the two displays... however my secondary monitor does not show the game at all, it stays in my DE. I have to use the keyboard on the menus as most of the things to click are on the right half, which is inaccessible. In addition to my Steam details, above that I am posting my xorg.conf.d's monitor configuration. It is pretty nvidia specific but otherwise standard. Unrelated to this, the framerate in windowed is quite poor, probably half of Window's.