Arch linux kernal 3.14.1-1 Playing the game for the first few minutes is lag free but it gets worse and worse during gameplay. I tried env LD_PRELOAD="libpthread.so.0 libGL.so.1" __GL_THREADED_OPTIMIZATIONS=1 but it does not seem to help much. Lag is more choppy but with bigger craft the game just gives constant lag. i7 4700k 2.6 @ 3.6 turbo nVidia 765m discreet card (bumblbee as bridge) 16GB DDR3