AmigaOS4 users note:

ITS NOT A GAME, ITS INTERPRETATOR FOR GAMES WHICH YOU NEED TO DOWNLOAD ELSEWHERE
, JUST LIKE SCUMMVM AND CO.

----About OpenJazz---

OpenJazz is a free, open-source version of the classic Jazz Jackrabbit™ games.
OpenJazz can be compiled on a wide range of operating systems, including Windows
98/Me/XP and Linux. To play, you will need the files from one of the original
games. 

With the demise of DOS-based operating systems, it has become necessary to use
emulators to play old DOS games. Jazz Jackrabbit™ deserves more - and would
benefit greatly from new features. 

OpenJazz was started on the 23rd of August, 2005, by Alister Thomson. Academic
pressures put the project on hold until late December 2005. The source code was
released on the 25th, and the first version with a degree of playability was
released on the 15th of January. Since then, a variety of ports have been
released by other people. 

More academic pressures meant there were few updates over the following few
years, but in 2009 a multiplayer version was released.

---About Jazz Jackrabbit™---

Jazz Jackrabbit™ is a PC platform game. Produced by Epic Games (then Epic
MegaGames), it was first released in 1994. The fast-paced, colourful gameplay
proved popular, and the game won PC Format's Arcade Game of the Year award. Many
people still recall the shareware versions.