Exploration.  Discovery.  These are terms which frequently find themselves thrown around when a game stimulates any sense of curiosity.  And yet, they tend to be ancillary features in whichever game they appear in.  Exploring the open worlds of Assassin’s Creed or Breath of the Wild is certainly a way to pass the time in each game, but they’re not the focus; there are quests to complete, baddies to hunt down, and so forth.