"To unlock this stage you need to beat Jerry's story (and get the best ending). The story is that Tom sees Maxwell and the magic notebook and steals it. Tom starts using it to try to catch Jerry. If you're playing as Jerry then you have to avoid Tom until Maxwell gets the magic notebook back. If your playing as Tom then you have to avoid Maxwell until you catch Jerry. If you want to know more about this game then click here: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=631983171. If you think this would be a fun game then share the link above and this hashtag (link it to the link above) #Tom and Jerry Mouse in the House."