Hitman: Blood Money is a classic. The freedom in how you approach each hit is insane! Disguise yourself, sneak around, poison food, rig accidents... they really nailed that methodical assassin gameplay. It definitely shows its age a bit with some wonky graphics and controls, and the story is kinda forgettable. But for that pure Hitman experience of planning and executing creative kills in sandbox levels, it's still top-notch.