If you meant a (a high-performance game server software), this is typically used for Minecraft and is not compatible with Frostpunk . For Frostpunk , you would simply extract the .rar file using a tool like WinRAR or 7-Zip . How to Proceed To create a physical "paper" version of this game's assets:

: You can create your own "paper" journal or strategy guide by printing out community-made walkthroughs from forums or Wikis. 3. Technical Context (Paper Server)

The request for "paper" in the context of a game file like likely refers to one of three things: a physical paper craft (papercraft), a digital guide or manual, or a "paper" server jar (though the latter is specific to Minecraft).