The rush of pride and satisfaction a player feels when overcoming a challenge at the height of their ability. Fiero is the emotional high associated with triumph and success, and the term is used in game design as a goal the developers wish the player to achieve.

“There is an ebb and flow to any Super Meat Boy session, a series of minor tragedies and frustrations, followed by a rush of fiero that pumps up the player for the next level.