Jazz Jackrabbit 2 Plus (JJ2+) adds countless features and bug fixes to both Single Player and Multiplayer gameplay within JJ2, and is used almost universally by most serious players. It has much better network code than the original game, adding console commands to online games, fixing most major game-crashing errors and connection problems, allowing permitted clients to log in as "remote administrators" in someone else's server and control the gameplay, and adding several new multiplayer gamemodes. It additionally fixes or enhances many of the events in the game, and allows level designers far more power than in regular JJ2 through the addition of an easy-to-use scripting language. JJ2+ takes everything great about JJ2 and adds so much more on top of it; it is truly a must-download. JJ2+ is distributed under the MIT license.
Preview of a new menu being worked on for some future JJ2+ release, offering some new kinds of gameplay for single player games. Currently there's no good way to enable mouse aim in single player, in particular, and game speed can only be set to the extremes of 50% and 200%, so this menu should really shake things up. And what could the censored sections say...?
Awesome, thank you!