'java.exe' is not recognized as an internal or external command,
operable program or batch file.
comes up when i try to run the launcher
You dont have Java64 installed.
Game requires Java, pretty much same as Minecraft. Its pretty much free tool, same as .Net Frameworks for other games.
You can get it here, make sure you get 64bit version.
https://java.com/en/download/manual.jsp