All 4 One is for sure the most...different from the others in the Ratchet and Clank catalogue. I don't think it's a bad game at all, far from it in fact. It's well put together, has a very neat concept that introduces some new mechanics, and a co-op Ratchet game is honestly pretty fun! Though that's also where the problems arrive.

If you don't have a friend or two to play this with, then this game can be a slog. You'll be forced to buddy up with an ai partner the whole adventure that sometimes works and sometimes doesn't. Combat and co-op puzzles can get boring very quickly as well if it's just you. At least if you have a few friends, the experience is enhanced by typical multiplayer shenanigans. Competing against each other, "accidently" launching each other off cliffs, and just joking about the game itself.

The story is a a bit interesting, following a mystery about the planet the main four are stuck on and how two scientists ruined it all. It's got lot of interesting lore bits if you're a Ratchet and Clank super nerd.

If you don't think you can convince a few friends to play this with you, then I would still recommend playing a level or two and see how you feel about it by then. At that point you can decide for yourself if you wanna keep playing or not. If you do skip it, you're not missing all that much.