I was playing through the game and in the menu there was a "???" tab. Does anybody by chance know what that was for? (Also i just realized this was a fan game, Does anybody by chance mind telling me the media its based on?)
If you're talking about the Achievements, those will fill in as you complete more endings And the series is called Lupin the Third! :D It's an anime that's been running on and off since the 70's. The studio uploaded a bunch of episodes over here: