I first passed by this term in the Art of Strategy book. Wikipedia has more details on the term here. Nalebuff and Dixit say in The Art of Strategy:

Good strategy must appropriately mix competition and cooperation.

Interestingly enough, they describe that young immature thinkers tend to think in terms of “self centered competition” and as they progress, they start thinking in cooperative as well as competitive terms. I noticed that in my own thinking patterns throughout the years.