Intruder's Thunder 3: Shadow Destiny is the sequel to Intruder's Thunder 2. It has an all-new rendering engine utilizing LWJGL, a new soundtrack, and various other improvements over the last game.
As of 11/23/2013, there is a demo version available.
I still need to develop more content for the game, but the first two levels are basically done. Please give it a try, and let me know what you like/do not like about the game. Any feedback is welcome and appreciated. Currently, there are Windows, Linux, and Mac versions. I have not tested out the Mac version, but it should work.
You can download the game here: https://sourceforge.net/projects/it3/Edit: 3/17/2014 - The game has been finished and the full version is available for download at the website specified above.