A post to MODMYWHAT points to some code they say was found in the recent Mafia II demo suggesting multiplayer support was part of the open world crime sequel at one point. They speculate that this may mean the game might actually yet include multiplayer support, though it seems pretty late to have not announced this by now. We shall see. Thanks joao. Also, the 2K Forums explain that the demo has been patch to fix a PhysX glitch, saying: "There was an outstanding Steam PhysX installation issue where PhysX/APEX settings on MED or HIGH will only be run on the CPU, drastically lowering performance. This has now been corrected – so if you experienced this problem yesterday, things should run a lot smoother for you today! You can also get the fix here: http://www.nvidia.com/object/physx_system_software.html." Thanks Game Blend.