Note: Call of Duty: Modern Warfare 2 and 3 are already represented on this blog with scripts, but the first Modern Warfare has yet to see one. Step in Patrick Lindsey, who did me the honour of becoming Playthroughline's newest contributor and completing the Modern Warfare trilogy by filling in the start. You can read his script through the link above.
For a thorough critical appraisal of the game, I direct your attention to Bullet Points, a splendid podcast run by Patrick, fellow Playthroughline contributor Ed Smith, and Reid McCarter. They put together an episode on the first Modern Warfare back in February, and it's full of interesting insights on what works and doesn't work in the game.
Patrick, Ed, and Reid have also recently started up Bullet Points Monthly, where they write a series of deep-dive articles focused on a single game each month. Their insights into Deus Ex: Mankind Divided especially are a great read. Do consider their Patreon if you enjoy their work.