>Shadow Man
I've been playing this recently for the first time (the remaster), and I'm enjoying it a lot more than I thought I would (I only played the sequel back in the day which was pretty dull and average from what I remember). I'm "only" about 15-20 hours in, but I can recommend it if you like the sound of a vast, non-linear, labyrinthine, exploration-oriented, horror-themed 3D metroidvania-style platformer. And if the blood and guts don't scare you, getting totally lost in a deep, branching network of disorienting and claustrophobia-inducing corridors and a seemingly-neverending series of interconnected rooms with multiple exits that all seem to lead to completely different areas with a new set of paths will!