all games are not created equal

You're thinking, why compare these two games? The answer: replayability and game length. Lumines  is fun for a puzzle game, and will likely addict you for a few hours. But in the end, you're doing the same thing over and over again. In Fallout 2, however, the world is constantly introducing new characters, locations, and challenges. Thanks to the level of character customization, you can also create a variety of playthroughs, each one different than the last. It's the reason people keep coming back to Fallout 2, while Lumines merely falls back to the wayside as 'that PSP puzzle game that was pretty popular in the past'.