There is a fine line between legal and illegal. Putting your game in game stores is obviously on the wrong side of the law. What happens when “your” game hits the internet and websites start columns and articles about it? Game-Network will notice, and since they are just a license holder and have no control over the actually international copyright of the game, they alert WEMADE Entertainment. And they will take action because your game is being distributed is mass-quantity, it doesn’t matter if it’s being sold for money or not. WEMADE has the right to sue for copyright laws, of course they won’t unless you are either attracting a extremely LARGE amount of players or your are charging money, hence literally “stealing” money from WEMADE.
The fact is, having the server files on your computer is already a violation of international copyright laws, hosting a server only escalates it. People that say “I’m using an emulator, so they cannot sue.” That is great. It looks exactly the same, and you are using the same sounds, models, that are made by WEMADE. Therefore you are in violation of the law. If you still think you are not in violation, do you think a judge will? I think not.
If you want to make a private server or connect to one, go ahead – I doubt you will be sued, but always remember you are in direct violation of the law so you basically have the choice to do what you wish.
In conclusion if you want to mass-distribute the game then go get a license, I hear they are around $250,000 and WEMADE takes a cut of your earnings.
Good night and good luck.