ServerOnly

A mod for server modpack makers to prevent people from playing singleplayer.
Just drag and drop it to the client modpack and upload it. Do NOT stick this on your server. This is CLIENT SIDE.
Yes, people could just delete it but most people don’t know to, or don’t even know the LOCATION of the mods folder. It’s fine.
There isn’t much to say here due to the simplicity of the mod!

Core modding post:
http://www.minecraftforum.net/topic/2380266-

Server Only post:
http://www.minecraftforum.net/topic/2532151-