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.
Occasional JJ2+ contributor DJazz created this script replacing the Electro-Blaster with an all new gun whose behavior is defined entirely in the level! The full code for this blade gun is available in the JJ2+ AngelScript snippets collection (http://www.jazz2online.com/snippets/).
I remember seeing that bullet sprite in an OEM version I had years ago :)
And it's still in the game!