An optimal experience that gradually gets tougher is sometimes referred to as the game's ______

Which of these is an example of an appointment mechanic?

In the context of social gaming, what does ARPU stand for?

An early example of gamification surrounding housework and household tasks was Kevan Davis' ___________.

One way to describe the landscape of potential choice is as a:

Converting an expected reward into player action by varying the quantity and delivery schedule of that reward is _____.

A player who is completely and entirely focused on winning achievements and gaining respect from other players is known as a(n) ______.

Badges, levels, and leaderboards are mechanics that are designed for ____________.

The activities in which a player participates during a game are often called:

During gameplay a player should always be:

Where is enterprise gamification used?