There's a lot of cool ideas in here! Traversing the remains of a wildfire and the ash-soaked mud while being hunted by a strange creature is an excellent hook. I love The Creature, it's powerful, intimidating, and smart.

Some reorganization would make the module a lot more clear - move all location information to the interior, put the Creature on the outer panel that's folded in so you can view it and the map at the same time, maybe add a diagram for the Tower.

Thanks for providing a printer friendly version!

I do love the premise of sending players into a haunted forest that's been recently been burnt down and unfortunately is still haunted. The Vessel, the main threat of the adventure, is a big threat that could potentially snowball if players end up being killed by it, encouraging players not to dawdle around and work quickly. This does pose a noteworthy risk of a TPK, I would advise that Referees give players some warning if they're about to be attacked by the vessel, and maybe give them another way to scare it off.  I'm not a fan of the blue background colour used throughout the document; its not easy on the eyes. Other than that and a couple of typos (in the Vessel's Personality Absorption 'trails' should read 'traits'), the layout is clear and information is easy to find. All in all Operation Free Fire does need some adjustments, but it does have the makings of a good One-Page horror adventure for FIST.