The graphics aren't that great, but it's really fun and addictive! You start out as a commander of a horde of Orcs, Humans, or Undead, witha asmall amount of funds, and you go around attacking mobs of monsters, other players, or other alliances fortresses. You get money and Victory Points as you go. You can use the money to buy more troops and weapons, or to upgrade skills.
You can unlock more weapons and skills by defeating certain mobs or monsters.
There are a few dungeons, which are very extensive, and offer special rewards to the player who is able to find the way to the lower levels and defeat the monsters there.
I'm now totally addicted.
Best of all, they continually add to the game, so there's always new things to do!