I have to inform you, this is not a true RTS. If you have ever played DotA, HoSK, AoS, or any similar warcraft 3 map, that is the closest game to this. It's more oriented with one hero-type unit, and multiple people per team, so, for example, 3 people each with a hero fight three other people each with a hero. Anyway, it's more action-oriented and yes there is strategy to it, just not in the vein you're thinking by mentioning DOW2.

Actually, this game is very similar to DoW2 since you like Dow2.   In DoW2, you pick a commander and you get to level up that commander, pick which skills he gets, and pick what kind of armor/weapon he gets.

Demigod is the same thing, except the whole game you only control 1 commander and nothing else.   There is no base building like in DoW2.  In DoW2, you find yourself capturing areas, running to another area and capping that area.   Demigod is the same thing, you are running back and forth between 2 flags to capture it. 

As for the single player mode, my understanding is that you start at level 1 at every skirmish so they don't carry over.  So 4 skirmishes later, you still start at level 1.  You might get some flavor points that acts as upgrades but they don't mean much.  Eventually by the 8th skirmish, you beat the game.

This game is alot easier to learn than DoW2.  Both are very fun games. 

their is skrimish though and the campaign I beleive is basicly just a tournament.

Gnats, you are correct. Every single game starts you at level 1 with nothing, and you must level up each time from the bottom, which is why i said DoW2 was different >> those comparing it probably served to confuse him.