Yes, but one could argue that many things are up to chance. If you, for example entered a video game contest that costs $10 to enter, and winner gets 60% of everyone who enters, is that haraam too?
The stock market is similar; is that haram? What about real estate purchased for the sole intention of reselling?
My point is everything has some element of chance in it. I would think that games based primarily on chance is haram, and many would argue that poker involves a lot of skill (This is why good poker players will most certainly beat amateurs.)