Oh my GOD the ending cutscene COMMENCE HELPLESS...
I know in the tags you were saying he’s happy cause he’s with Rouge. And I agree, but he also doesn’t have any memories at this point. I think it’s also an indication of Shadow’s personality before the Ark incident. He’s more carefree. Maria also hints to a more playful side when she mentions him always running along a certain part of the Ark. Poor guy. :(
Heroes gave me a lot of unexpected insight into how Shadow’s mind works, which is funny seeing as it’s probably the least plot-heavy of the Sonic games I’ve played. Shadow is kind of predisposed to angst anyway, he was wondering about his “true” purpose even 50 years ago back on the ARK. But like, I found this tidbit on the wiki a while ago and I think it’s really significant:
Shadow’s personality was intentionally designed to be like Maria’s, and we know Maria was an incredibly kind and caring person. Shadow was once like that too. Maria says that line about running along the ARK when you come across a huge slope in one of her levels, and I can just imagine them running around the ARK together, him racing as fast as possible down the slope laughing. Back then, Shadow could afford to be carefree.
In SA2 he still had memories, but they were garbled, destructive memories, which turned him into a destructive person. In Heroes... all of that is gone. He has no memories. The only thing he’s aware of is that he woke up in this base, a robot tried to kill him, and now this treasure hunter is greeting him like an old friend. (Not that they were exactly friends in SA2, but I think Rouge cared about him more than she would have wanted to admit even back then.) And Rouge’s personality is quite lighthearted too. She’s nothing like Maria, but she is pretty cheerful when things are going her way, and she seems to be excited to be able to work with Shadow again. She might even be secretly glad that he doesn’t remember her, due to the insults they flung at each other during the ending of the SA2 Dark story - they didn’t really end on good terms, but Rouge I think found herself struck by how upset she was at his “death”, and appreciated being able to have a second chance with him.
Anyway, point - because he didn’t really have any baggage holding him back, Shadow’s original personality began to shine through, which let him get along splendidly with Rouge. There wasn’t really much at stake for him in this game, apart from the one moment where he sees the broken Shadow Android. In ShTH, things got a lot worse for him because he had aliens manipulating and mind controlling him, Eggman attempting to do the same, GUN hunting him down, not to mention his memories slowly coming back one by one in confusing and upsetting ways. He had it incredibly rough in that game.
I’d like to think that after ShTH, he can start to heal again. He’s got most of his memories back, most of the characters are willing to be friendly with him, he’s got Rouge and Omega as closer friends, and he’s got a job. He’s clearly still traumatized, but he’s doing better.
I never had the full picture of Shadow until I beat all four of his core games: SA2, Heroes, ShTH, and ‘06. And I can say that with every game I played, I loved my son more and more. <3