I actually own a copy of Invisible war but never played it because of the negative hype, my computer also wiped out i think it may be able to handle it now though.... may have to give it another go... did warren spector (sp?) make IW as well ? or was it different people working on it ?

May have to look into thief as well.. i enjoyed the demo of the first one when i played it years ago never got around to buying it though.... whats the latest one thief 3 ?