Not a review but going back to the first game for a bit after beating the rest of the trilogy made me realize that oh, this is one of my favorite games ever. I love just thinking about it, untangling this confusing mess of loose threads that come together so perfectly. It's also the only game in the series that has you read some of the most esoteric shit in any game while some bumping MIDI tune is playing, only to never directly reference said writing again. The feeling created by the way the story is told, the confusing and sometimes bullshit level design, and the extremely charming visuals and music is entirely its own, and it plays nicely too. No other game hits quite the same as Marathon 1 and I cannot appreciate that enough.
On a side note, the Mandalore review is great but PLEASE don't think there's nothing left for you here if you watched that. If you're at all into Bungie, old school shooters, or just weird games in general, I implore you to give it a shot. It's free and coming to Steam soon enough as well.