Orion is a powerful mod that facilitates creating own role playing or shooter games. It provides an extensive trigger library that exceeds any other mod I know, has full GUI support, and grants a huge amount of configurability and flexibility.
Got interested? Test it out by playing the presentation map "Orion Sample", which is online on EU servers or can be downloaded here on SC2Mapster.com (please read the notes in the map's patch notes to learn how to install the mod). You can also use that map as an example of how to use the mod (currently there is no English tutorial for the mod).
Please PM me for any feedback, bug reports or ideas for new features. Please also PM me if you want to get the mod explained.