Halo CE. My dad came home from a deployment in Turkey with an NA Xbox he'd gotten for cheap. Said this Halo game was the new big craze. I spent the entire night watching him play as many campaign missions as he could get through.
After that, he always wanted to play 1v1 with me and I always wanted to play co-op, until I got good at the game, then he wanted to play co-op more lol. We kept playing Halo together for years. I have a fond memory of playing it at the Air Force base and absolutely annihilating everyone there and carrying our team on Valhalla. My dad said,"..and you weren't hiding either, you stood in the middle of the map like COME AT ME. The guys were going nuts after you left.".. and I was so proud of myself.
He stopped playing Halo sometime during Halo 4 because he said it didn't feel the same anymore. Now when I bring up Halo 6 he's like "they're still making Halo games?" Halo was something that brought my father and I together. He was always gone on deployment but when he was home we could always play Halo. He doesn't play anymore because he doesn't like it any longer, he especially hates Halo 5 with how many different buttons he has to constantly push just to play the game, and I've lost that thing that I could do with him. It really bites.
The feels man. The feels.