If the game is only fun to play once, then: enjoyment - cost = value
If the game has good replayability, cost is not taken into account.
What makes you want to replay a game? Deep and engaging gameplay, giving you different options of varying risk vs reward values. A learning curve and a degree of challenge to give you a sense of accomplishment. Creative level design and use of gameplay mechanics to inspire the player into tackling things in new ways. As well as cutting-edge graphics that will put the player into a state of awe as it attempts to make progress while being distracted from the timeless, mind-blowing visuals.







