Single player without world exploring (only char creating) – Version 0.3
Single player for exploring worlds only, with pre-made characters. Easy to set up – Version 0.5.1
Single player for exploring worlds including launchpads with custom characters. XAMPP (Apache & MySQL) needed with luni sql uploaded at http://localhost/phpmyadmin – Version 0.6.3
Most complicated to set up, has multiplayer, version «0.8» from GitHub. This is what the public servers run on.