Try the new AI-powered Infinite Story.

Project Theta 27

You roll to the side, and look to your right, just to see one of those giant meat cleavers go flying by where you just were. "What is this?!" You shout at the expanse of white. The cool, feminine computerized voice responds:
"A test, 153815. So far you have shown good skill. How will you do, though, against human opponents?" To your shock, a man appears in front of you. He seems very confused.
"Both of you will now fight until one of you kills the other. If both of you decide to let each other live, then you both die."
The computerized voice starts to freak you out. This is crazy. Suddenly, a dagger-like blade appears in mid-air in front of you, such as with your opponent. The computerized voice calls out in it's creepy voice,
"Begin the duel."