Hellas is a wonderful mash up of Greek mythic fantasy and space opera. This is not a far future version of mythic Greece. It is instead a translation of Greek mythic fantasy into a technological advanced interstellar setting.
The book is a weighty tome and complete. There is a detailed setting chapter, extensive bestiary and equipment chapters, full treatment of the Gods and interesting ideas regarding space travel, "hyperspace" etc. PCs are created using a life path system similar to that in Pendragon, which results in storied and powerful heroes right out of the box, pursuing their destiny whilst striving to avoid their fate.
The system uses a single d20 and, though of medium complexity, is fast and easy to use in play. There is also consideration given to supporting the GM to make their job easier.
If you love Greek myths but want a fresh take on them or also love space opera as well, then this RPG for you.