Copio dalla pagina del gioco su Steam:
What happened to the Mac version?
I had originally planned to launch on both Mac and Windows, but finishing the game took way longer than expected, so plans had to change.
UDK supports Mac, and I plan to support it as well, but I need to get the PC version stable first and then update my version of the Engine so that I can gain access to UDK's Mac support. Unfortunately this was not entirely trivial the last time I tried, but is something I will be able to get done when I am not also focusing on finishing and launching the game in the first place.
Will there be a native Linux version?
Probably not. UDK doesn't support that.
Consoles? iOS?
There are currently no plans for any platforms other than PC. This may change in future.
Potrebbe valere la pena di chiedere su twitter/email se è cambiato qualcosa, ora sto uscendo quindi fallo tu.