After about a year without a release of any kind (sorry guys), I have created a spinoff of Reality ODST called Apocalypse. Currently in alpha, it will serve me as a tutorial to Custom Edition as it is my first map for Halo CE.
Here's the download link
Eventually after continually refreshing the page it should work,
but if it still refuses to work, download it more directly from the second link.
Secondary download link
WAIT HERE IS A QUICK 2 min vid that showcases some gameplay