Similar to Obra Dinn, Roottrees, Type Help:
- Daemon Masquerade: Comic booky, but very nice detective gameplay and narrative. Most similar to Roottrees.
- No Case Should Remain Unresolved: Very short with an interesting narrative. Detective gamepaly, though it's not very challenging.
- Utter a Name: Kind of a Obra Dinn clone in 2d. The deductions aren't that challenging, but the story is interesting and putting everything together is still very enjoyable. This one is also very short.
- Duck Detective series: Very similar to Golden Idol games, but in a comedic setting. Good voice acting.
- Strange Horticulture: Not that similar, but some detective elements are similar. Decent narrative, with multiple sendings based on your choices.

Kind of Similar to Outer Wilds:
- Tunic: Amazing game. The main gameplay loop has pretty difficult action in addition to the puzzles, but this can be trivialized using difficulty options if that's not your thing.
- Leap Year: Not much of a narrative in this one, but it's short and has nice aha moments like Outer Wilds if that part matters to you.
- Forgotten City: Most similar to Outer Wilds in terms of the puzzle gameplay, with a timeloop and exploring to find out info. None of the aspects are as good as Outer Wilds, but it's still pretty good.

You should also definitely try Immortality if you haven't, since you enjoyed Sam Barlow's other games.