Demigod is a new PC game in the style of Defense of the Ancients, much like how the famous Tower Defense games are moving beyond their minority status.
I've read a few reviews, all glowing, none of which were able to categorize the genre with any particular ease. "RTS-RPG" was thrown around a fair amount, and I suppose that's fairly accurate. The old genres of gaming are now so interbred that any notion of purity has been long since lost, so it makes sense to label them accordingly.
But the RTS-RPG is not new, however much the reviews may imply it. Demigod is not the first video game outside of the customized maps of Starcraft and Warcraft to explore the genre. Dynasty Warriors has been doing it for years.
Alright, so Dynasty Warriors is more like an Action-RTS mutt, but really the differences are smaller than you think. In fact, the core difference effectively boils down to how you control your avatar. Do you A) Mash buttons to attack and use special abilities or B) Select targets, auto attack, and hit the odd key for a special? To auto-attack, or not to auto-attack, that is the question.
We could drive down into the minutiae of it, but in the end DotA is Dynasty Warriors with fewer buttons to mash and a different camera angle. This isn't a bad thing, it's just the truth of the RTS-RPG genre.
Incidentally, I plan on trying Demigod. Maybe now that Koei and Tecmo have merged a better Dynasty Warriors may result, but in the meantime I need my massive army slaughtering fix. If all the reviewers are as horribly addicted as they claim, Demigod might just be it.