ENDOGENY

Value or meaning an in-game object or resource has to a player, completely derived from game design and in-game context. This value can be created using the difficulty of challenges, internal economic systems, from the game’s narrative, or through other methods.

“By adding highly visible and advantageous real-money microtransactions, games like Assassin’s Creed and Mass Effect 3 lose the endogeneous value built up by their complex universes.”