Welcome to Stiq Figures, where the sales data is after the break and the posts don't matter.
RPGs are the easy suspect here, and I've had my fair share of epic adventures cut short - I could never take another serious swing at Pokemon Red after losing my level 82 Charizard to a dead battery, and as much as I loved The Legend of Dragoon, I could never face a three-disc retread to replace my saved-over file. Shorter games have fallen victim to the same fate, though - a botched data transfer to the Wii U cost me my progress on Okami and Muramasa: The Demon Blade, and I'm unlikely to face either ever again.
Are there any games that, despite being enjoyable enough, you'll never finish because of lost time? Vent with us about memory cards and corrupted data, right after you check this week's Japanese hardware sales after the break!