I got this game and it isn't like dungeon siege at all more like Neverwinter Nights. The combat is real time w/ pause with a tactical view similar to an rts. There are 6 stats with resistances, perks, and various skills. The skills include chemistry, firearms, and mechanical armor type skills along with the fantasy rpg type skills. Since I have just started playing I haven't gotten very far but it begins a little differently then other rpgs. (your character is from our world)
PS. Not all enemies immediately attack you and you have a good chance to miss when you attack. (at the beginning at least)
PPS. I will post updates on the game system as I get further.
PPPS. Other then it being a real time with pause system it feels like Arcanum so far. (I never played in the real time system in Arcanum so can't say how it compares to that)