The big bad bossman is in his gothic tower, cackling maniacally. Lightning crashes across the apocalyptic wasteland. Lava seeps in through the cracks of this hellscape, and winged beasts fill the night sky. All would seem lost if it weren't for the fact that our heroes have arrived at this final castle, this last bastion of evil, and they are ready to kick some ass. But wait is that an arcade next door? Sweet! I wonder if they have Battletoads?
Many video games do a great job at making you think the stakes are at their highest, but because they give you the freedom to go wherever you want, that great cataclysm will usually wait while you shirk your quest and play some minigames. These are some of the more extreme examples.