A video game with a roadmap is an excellent example of a well-structured marketing journey.
With an end goal in sight, a player's quest can only be achieved by completing a sequence of events. There are targets to hit, traps to avoid, and milestones to reach along the way. Strategies may vary, and levels can be replayed, all in the game of maximizing one's winnings.
The biggest challenge is understanding any game's physics. But once you've mastered the pattern that's when you start finding all the hidden easter eggs and begin coining in on massive bonus points.