Operation Flashpoint: Elite has a hidden features menu?

Once unlocked it can be accessed by holding the Left Trigger and the White Button simultaneously.

You can share knowledge with other users? 

Join the Official Bohemia Interactive Forums.

Walking across the island on foot from one end to the other takes 45 minutes real time?

The sea has fully simulated tides? Wave size and pattern change according to weather conditions at sea?

Seagulls fly mostly near the sea? You can spot a hawk, if you're lucky?"

Trees, bushes and grass not only sway in the wind but are also influenced by nearby landing helicopters

There are flies, honey-bees, and even dragonflies, mosquitoes or butterflies flying around?

There are real star constellations? There are moon phases?

Church bells ring on each hour?

You can hold your breath for a couple of seconds in the game to aim more accurately? You can stabilize your weapon aim by slightly pressing the firing trigger.