For how Halo is considered the pioneer of the modern FPS genre, it's a really interesting experience playing through this game. Tremendous age shows (Dozens of repeating areas/floors, mundane backtracking, and overall jank) but at the same time the gunplay and vehicle controls hold up incredibly well and still offer a really fun time.

It's very far from perfect, but an admirable piece of history that, despite many flaws, still holds value.