Galaxian
Lurker
I don't really like when the series goes all out dark, by the end you feel sort of numb when the tragedies continue to happen the main character. Look at 555 for example, near the end when Yuka died I shrugged off because a lot of people had already died in that one. Yet, I got bit teary eye during the final episodes of Den-O when they had to leave Kintaros behind.