Tron 2.0 (Monolith Productions)

A stunning looking game, especially for its time (it was released in 2003), Tron 2.0 nails everything about the universe it draws its inspiration from. Super fun and surprisingly deep, it has a way of immersing you in the Grid very quickly. It's been kept alive all these years by the talented modders who created the Killer App Mod for it, which brings it up to date for more recent operating systems and adds new features. They helped me get a free camera working for it.