My MacOS High Sierra was having a lot of difficulty playing. I was lagging just by opening the game and I could barely move when I hit "Play." (It was kind of fun tho because I had to survive with 1-3 fps!) My Mac book is a Late 2009 with a 2.26 GHz Intel Core 2 Duo Processor and NVIDIA GeForce 9400M 256 MB Graphics and I really would like to play this game lag free. Could you try to make the game less laggy so I can play? If you could that would be Great.
Edit: Is the Multiplayer limited to the operating system you use or is a Cross-platform?