The source code from mineplex 2018 leak with commit history dating back to 2014, it requires a lengthy setup to get functional but is a reasonably easy compile if you know what your doing just have to repatch the spigot

Chiss 1977572ced Added Halloween Minigame ... Updated gadgets and other minor things.		2013-10-22 15:46:31 +11:00
Maps	Bob wants to play!	2013-08-29 15:55:49 +10:00
Plugins	Added Halloween Minigame	2013-10-22 15:46:31 +11:00
TestApps/LOCTester	Initial Commit	2013-08-27 08:14:08 -07:00
TexturePack	Initial Commit	2013-08-27 08:14:08 -07:00
Webserver/ServerHandler	Initial Commit	2013-08-27 08:14:08 -07:00
Website	Converted gem rewards to boolean return from website.	2013-10-18 00:46:06 -07:00