  We propose the following question: what game-like interactive system would
provide a good environment for measuring the impact and success of a
co-creative, cooperative agent? Creativity is often formulated in terms of
novelty, value, surprise and interestingness. We review how these concepts are
measured in current computational intelligence research and provide a mapping
from modern electronic and tabletop games to open research problems in
mixed-initiative systems and computational co-creativity. We propose
application scenarios for future research, and a number of metrics under which
the performance of cooperative agents in these environments will be evaluated.
