10 Underhand Ways Video Games Get You Hooked
2. Bonus Movies/Secret Endings
Secret endings are a big deal. They can shed more light on what happened in the story, explain an unclear ending, or maybe even tease a sequel. All things you want to know. However, these are "secret" for a reason, and you shouldn't think the developers aren't going to make you work to see them. Sure, you could just look them up on YouTube, but that wouldn't be the same now would it?
Master of secret ending deceit? Any game in the Kingdom Hearts franchise. In the first and second Kingdom Hearts games, you had to complete 100% of the in game journal entries to see the secret endings. If you've played Kingdom Hearts, you know this is a monstrous task, requiring immense patience, diligence, and commitment. In the more recent Birth By Sleep spinoff, you could either opt to complete all of the journal, or beat the game on the hardest difficulty setting to see the special ending. Are these endings worth it? That's debatable, but boy don't you feel good about yourself afterwards?...That's also debatable.