The .rar extension indicates this is a compressed package, likely used for manual installation or distribution of the game's update. If you are looking for the latest official version, it is available through platforms like Steam.
: Reduced the requirements for the "Annihilator" achievement by half (two times fewer monster kills required).
: Added support for in-game shadows to improve visual depth.
: Improved control schemes to make gameplay more intuitive for PC players.